ARM: OMAP2+: PRM: move SoC specific init calls within a generic API

This gets rid of need for some exported driver APIs, and simplifies the
initialization of the PRM driver. Done in preparation to make PRM a
separate driver. The init data is now also passed to the SoC specific
implementations, allowing future expansion to add feature flags etc.

Signed-off-by: Tero Kristo <t-kristo@ti.com>

arch/arm/mach-omap2/prm54xx.h

@@ -22,7 +22,6 @@
 #define __ARCH_ARM_MACH_OMAP2_PRM54XX_H
 
 #include "prm44xx_54xx.h"
-#include "prcm-common.h"
 #include "prm.h"
 
 #define OMAP54XX_PRM_BASE		0x4ae06000