plat: brcm: Remove 'AARCH32' deprecated macro
plat: brcm: Remove 'AARCH32' deprecated macro

Removed 'AARCH32' deprecated macro from 'stingray'
Broadcom platform code.

Change-Id: If8d9e785b7980fefd39df06547fcf71b899fd735
Signed-off-by: Manish V Badarkhe <d2342ad575f6bc1a5f5a5b89d6db0f72dd7e0e4c@arm.com>

achingupta/arm-trusted-firmware,achingupta/arm-trusted-firmware