Initial support for Broadcom VideoCore / BCM21553

This commit adds Broadcom support for:
* frameworks/base

Enable via:
* BOARD_USES_BROADCOM_HARDWARE := true
* COMMON_GLOBAL_CFLAGS += -DBCM_HARDWARE

Change-Id: Ibcda4c13189f349a25711656c886fc2ddf603035
Merge "Initial support for Broadcom VideoCore / BCM21553" into cm-11.0