ARM: OMAP2+: Simplify system timers definitions

There is a lot of redundancy in the definitions for the various system
timers for OMAP2+ devices. For example, the omap3_am33xx_gptimer_timer_init()
function is the same as the omap3_gp_gptimer_timer_init() function and the
function omap4_sync32k_timer_init() can be re-used for OMAP5 devices.
Therefore, consolidate the definitions to simplify the code.

Signed-off-by: Jon Hunter <jon-hunter@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Igor Grinberg <grinberg@compulab.co.il>
diff --git a/arch/arm/mach-omap2/common.h b/arch/arm/mach-omap2/common.h
index b435027..594ab3b 100644
--- a/arch/arm/mach-omap2/common.h
+++ b/arch/arm/mach-omap2/common.h
@@ -82,8 +82,7 @@
 extern void omap2_sync32k_timer_init(void);
 extern void omap3_sync32k_timer_init(void);
 extern void omap3_secure_sync32k_timer_init(void);
-extern void omap3_gp_gptimer_timer_init(void);
-extern void omap3_am33xx_gptimer_timer_init(void);
+extern void omap3_gptimer_timer_init(void);
 extern void omap4_local_timer_init(void);
 extern void omap5_realtime_timer_init(void);