arm: omap1: fix compile warnings

Fix the following compile warnings:
arch/arm/mach-omap1/board-innovator.c:165:3: warning: initialization
makes integer from pointer without a cast
arch/arm/mach-omap1/board-perseus2.c:305:3: warning: initialization
makes integer from pointer without a cast
arch/arm/mach-omap1/board-fsample.c:338:3: warning: initialization makes
integer from pointer without a cast

Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>