dev/keypad: Removed unnecessary scans for detecting key press event.
dev/keypad: Removed unnecessary scans for detecting key press event.

- Reduces boot time spent in LK.

Change-Id: I62f289bd46dcd18ed1a42aeeceb7480f2241be6d

M1cha/android_bootable_bootloader_lk,my4ndr0id/android_bootable_bootloader_lk,detule/lk-g2-spr,M1cha/mi2_lk,Blefish/android_bootable_bootloader_lk,t2m-foxfone/kernel_lk,lg-devs/g2-bootloader,t2m-foxfone/kernel_lk,utilite2/lk,thornbirdblue/codeaurora_lk,beidl/lk_umia,M1cha/mi2_lk,efidroid/lk,CanarySolutions/little-kernel,utilite2/lk,my4ndr0id/android_bootable_bootloader_lk,Foxda-Tech/polaris-bootable-bootloader-lk,lg-devs/g2-bootloader,xndcn/moboot-for-veer,jbott/lk_gee,idor/dk50-bootable_bootloader_lk,beidl/lk_umia,t2m-foxfone/kernel_lk,mozilla-b2g/fairphone2_kernel_lk,M1cha/android_bootable_bootloader_lk,hanjae/lumiab0,RonGokhale/android_lk_bootloader,t2m-foxfone/android_kernel_lk,zhuotong/mi2_lk_NoEmmc,jcsullins/moboot,chirayudesai/android_bootable_bootloader_lk,Redmi-dev/android_bootable_lk,thornbirdblue/codeaurora_lk,DooMLoRD/android_bootable_bootloader_lk,idor/dk50-bootable_bootloader_lk,M1cha/android_bootable_bootloader_lk,M1cha/mi2_lk,zhuotong/mi2_lk_NoEmmc,lg-devs/g2-bootloader,zhuotong/mi2_lk_NoEmmc,DooMLoRD/android_bootable_bootloader_lk,jsr-d9/android_kernel_lk,CanarySolutions/little-kernel,RonGokhale/android_lk_bootloader,utilite2/lk,M1cha/lktris,mozilla-b2g/kernel_lk,idor/dk50-bootable_bootloader_lk,Blefish/android_bootable_bootloader_lk,M1cha/lktris,oubeichen/lk-v500,detule/lk-g2-spr,jsr-d10/android_bootable_bootloader_lk,t2m-foxfone/kernel_lk,zhuotong/mi2_lk_NoEmmc,xndcn/moboot-for-veer,Blefish/android_bootable_bootloader_lk,CanarySolutions/little-kernel,jsr-d9/android_kernel_lk,M1cha/lktris,thornbirdblue/codeaurora_lk,jbott/lk_gee,Foxda-Tech/polaris-bootable-bootloader-lk,M1cha/android_bootable_bootloader_lk,jsr-d10/android_bootable_bootloader_lk,jsr-d10/android_bootable_bootloader_lk,Redmi-dev/android_bootable_lk,jsr-d10/android_bootable_bootloader_lk,oubeichen/lk-v500,jcsullins/moboot,t2m-foxfone/kernel_lk,utilite2/lk,utilite2/lk,t2m-foxfone/android_kernel_lk,Blefish/android_bootable_bootloader_lk,pichina/lk,Redmi-dev/android_bootable_lk,my4ndr0id/android_bootable_bootloader_lk,MiCode/mi2_lk,M1cha/android_bootable_bootloader_lk,MiCode/mi2_lk,Foxda-Tech/argo8-bootable-bootloader-lk,hanjae/lumiab0,jsr-d10/android_bootable_bootloader_lk,mozilla-b2g/kernel_lk,jsr-d9/android_kernel_lk,efidroid/lk,mozilla-b2g/fairphone2_kernel_lk,detule/lk-g2-spr,hanjae/lumiab0,Foxda-Tech/polaris-bootable-bootloader-lk,jbott/lk_gee,my4ndr0id/android_bootable_bootloader_lk,pichina/lk,efidroid/lk,zhuotong/mi2_lk_NoEmmc,detule/lk-g2-spr,idor/dk50-bootable_bootloader_lk,Foxda-Tech/argo8-bootable-bootloader-lk,MiCode/mi2_lk,chirayudesai/android_bootable_bootloader_lk,t2m-foxfone/android_kernel_lk,CanarySolutions/little-kernel,jcsullins/moboot,Foxda-Tech/argo8-bootable-bootloader-lk,RonGokhale/android_lk_bootloader,jbott/lk_gee,chirayudesai/android_bootable_bootloader_lk,jsr-d9/android_kernel_lk,my4ndr0id/android_bootable_bootloader_lk,oubeichen/lk-v500,oubeichen/lk-v500,thornbirdblue/codeaurora_lk,DooMLoRD/android_bootable_bootloader_lk,pichina/lk,xndcn/moboot-for-veer,jcsullins/moboot,mozilla-b2g/fairphone2_kernel_lk,pichina/lk,beidl/lk_umia,xndcn/moboot-for-veer,mozilla-b2g/fairphone2_kernel_lk,Redmi-dev/android_bootable_lk,Foxda-Tech/polaris-bootable-bootloader-lk,M1cha/mi2_lk,M1cha/lktris,efidroid/lk,efidroid/lk,lg-devs/g2-bootloader,Blefish/android_bootable_bootloader_lk,pichina/lk,mozilla-b2g/kernel_lk,RonGokhale/android_lk_bootloader,mozilla-b2g/kernel_lk,beidl/lk_umia,M1cha/android_bootable_bootloader_lk,Foxda-Tech/argo8-bootable-bootloader-lk,Foxda-Tech/polaris-bootable-bootloader-lk,t2m-foxfone/android_kernel_lk,Foxda-Tech/argo8-bootable-bootloader-lk,mozilla-b2g/fairphone2_kernel_lk,xndcn/moboot-for-veer,mozilla-b2g/kernel_lk,DooMLoRD/android_bootable_bootloader_lk,oubeichen/lk-v500,jsr-d9/android_kernel_lk,jcsullins/moboot,hanjae/lumiab0,detule/lk-g2-spr,M1cha/mi2_lk,lg-devs/g2-bootloader,MiCode/mi2_lk,CanarySolutions/little-kernel,idor/dk50-bootable_bootloader_lk,DooMLoRD/android_bootable_bootloader_lk,hanjae/lumiab0,t2m-foxfone/android_kernel_lk,jcsullins/moboot,chirayudesai/android_bootable_bootloader_lk,chirayudesai/android_bootable_bootloader_lk,thornbirdblue/codeaurora_lk,jbott/lk_gee,RonGokhale/android_lk_bootloader,beidl/lk_umia,MiCode/mi2_lk,Redmi-dev/android_bootable_lk,M1cha/lktris