platform: msm_shared: Fix unexpected events handling.
platform: msm_shared: Fix unexpected events handling.

Due to difference in the implementation of vendor software
for usb host controller, device side receives unexpected events.
It is safe to ignore such events and continue instead of halting
the execution.

CRs-Fixed: 649864
Change-Id: Icdca7e36023b050b8ef6f3a666a9cea7a49526ed

CanarySolutions/little-kernel,M1cha/android_bootable_bootloader_lk,Foxda-Tech/polaris-bootable-bootloader-lk,CanarySolutions/little-kernel,CanarySolutions/little-kernel,M1cha/android_bootable_bootloader_lk,M1cha/android_bootable_bootloader_lk,CanarySolutions/little-kernel,M1cha/android_bootable_bootloader_lk,Foxda-Tech/polaris-bootable-bootloader-lk,M1cha/android_bootable_bootloader_lk,efidroid/lk,efidroid/lk,efidroid/lk,CanarySolutions/little-kernel,Foxda-Tech/polaris-bootable-bootloader-lk,M1cha/android_bootable_bootloader_lk,efidroid/lk,M1cha/lktris,Foxda-Tech/polaris-bootable-bootloader-lk,M1cha/lktris,efidroid/lk,M1cha/lktris,M1cha/lktris,Foxda-Tech/polaris-bootable-bootloader-lk,M1cha/lktris