ARM: 6481/1: Use shared GIC entry macros on OMAP

Common GIC entry macro for omap

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Magnus Damm <damm@opensource.se>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>