Revert "ARM: gic: Patches for 8625 hardware workaround"

This reverts commit a539ac31.
Dropping support for MSM8625 to clean up for arm64.

Conflicts:
	include/linux/irqchip/arm-gic.h
	drivers/irqchip/irq-gic.c

Change-Id: I9c54bde5b080da36930cf1286c17896e2bd5966b
Signed-off-by: Abhimanyu Kapur <abhimany@codeaurora.org>