Initial support for Broadcom VideoCore / BCM21553

This commit adds Broadcom support for:
* frameworks/native

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

Change-Id: Iba16d9c504a386f8a47c8b33962b7c079f380bd5
Cleanup BCM21553 functions

Change-Id: If8c318099e70caa52e71b390377ba8e138e7c795
Bypass skipping of premult. alpha on statusbar for Broadcom GPUs

This causes major performance regressions on BCM21553 devices.

Change-Id: I158fc00224c5bffad30f1b1f3f70e38fed27e7ff