target: mdm9625: fix size calculation for available memory
target: mdm9625: fix size calculation for available memory

The size calculation is incorrect when updating memory information.
This results in reporting memory that may not exist to kernel.

Change-Id: Iad1ea1f0a49d7b05941fac570cc4fc9772d18249

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