target: msm8x10: Add target ununit function
target: msm8x10: Add target ununit function

Add target ununit function to perform target specific
cleanup before jumping to kernel.

Change-Id: I152142e37590771b0e915534a068d6597b3735f2

idor/dk50-bootable_bootloader_lk,Foxda-Tech/polaris-bootable-bootloader-lk,efidroid/lk,M1cha/lktris,efidroid/lk,Foxda-Tech/polaris-bootable-bootloader-lk,Redmi-dev/android_bootable_lk,CanarySolutions/little-kernel,lg-devs/g2-bootloader,CanarySolutions/little-kernel,Foxda-Tech/polaris-bootable-bootloader-lk,Foxda-Tech/argo8-bootable-bootloader-lk,jbott/lk_gee,t2m-foxfone/kernel_lk,M1cha/android_bootable_bootloader_lk,t2m-foxfone/android_kernel_lk,efidroid/lk,t2m-foxfone/kernel_lk,M1cha/android_bootable_bootloader_lk,lg-devs/g2-bootloader,mozilla-b2g/kernel_lk,Foxda-Tech/polaris-bootable-bootloader-lk,M1cha/android_bootable_bootloader_lk,detule/lk-g2-spr,CanarySolutions/little-kernel,efidroid/lk,M1cha/android_bootable_bootloader_lk,jbott/lk_gee,mozilla-b2g/kernel_lk,jsr-d10/android_bootable_bootloader_lk,jbott/lk_gee,M1cha/lktris,mozilla-b2g/kernel_lk,Redmi-dev/android_bootable_lk,idor/dk50-bootable_bootloader_lk,lg-devs/g2-bootloader,jsr-d10/android_bootable_bootloader_lk,Foxda-Tech/argo8-bootable-bootloader-lk,t2m-foxfone/android_kernel_lk,Foxda-Tech/polaris-bootable-bootloader-lk,mozilla-b2g/fairphone2_kernel_lk,mozilla-b2g/fairphone2_kernel_lk,M1cha/lktris,Redmi-dev/android_bootable_lk,detule/lk-g2-spr,mozilla-b2g/kernel_lk,t2m-foxfone/kernel_lk,idor/dk50-bootable_bootloader_lk,M1cha/android_bootable_bootloader_lk,idor/dk50-bootable_bootloader_lk,jsr-d10/android_bootable_bootloader_lk,Redmi-dev/android_bootable_lk,jsr-d10/android_bootable_bootloader_lk,mozilla-b2g/fairphone2_kernel_lk,mozilla-b2g/kernel_lk,mozilla-b2g/fairphone2_kernel_lk,lg-devs/g2-bootloader,detule/lk-g2-spr,CanarySolutions/little-kernel,idor/dk50-bootable_bootloader_lk,jbott/lk_gee,Foxda-Tech/argo8-bootable-bootloader-lk,detule/lk-g2-spr,t2m-foxfone/kernel_lk,CanarySolutions/little-kernel,M1cha/lktris,t2m-foxfone/android_kernel_lk,efidroid/lk,t2m-foxfone/android_kernel_lk,mozilla-b2g/fairphone2_kernel_lk,lg-devs/g2-bootloader,Foxda-Tech/argo8-bootable-bootloader-lk,jbott/lk_gee,Foxda-Tech/argo8-bootable-bootloader-lk,M1cha/android_bootable_bootloader_lk,M1cha/lktris,Redmi-dev/android_bootable_lk,jsr-d10/android_bootable_bootloader_lk,t2m-foxfone/kernel_lk,t2m-foxfone/android_kernel_lk,detule/lk-g2-spr