ARM: OMAP2/3: Remove OMAP_PRM_REGADDR and OMAP2_PRM_BASE

Remove OMAP_PRM_REGADDR and use processor specific defines instead.

Also fold in a patch from Kevin Hilman to add _OFFSET #defines
for the PRCM registers to be used with the prm_[read|write]_* macros.
These are used extensively in the forthcoming OMAP PM support.

Also remove now unused OMAP2_PRM_BASE.

Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/mach-omap2/sdrc2xxx.c b/arch/arm/mach-omap2/sdrc2xxx.c
index 0afdad5..feaec7e 100644
--- a/arch/arm/mach-omap2/sdrc2xxx.c
+++ b/arch/arm/mach-omap2/sdrc2xxx.c
@@ -99,7 +99,10 @@
 	m_type = omap2xxx_sdrc_get_type();
 
 	local_irq_save(flags);
-	__raw_writel(0xffff, OMAP24XX_PRCM_VOLTSETUP);
+	if (cpu_is_omap2420())
+		__raw_writel(0xffff, OMAP2420_PRCM_VOLTSETUP);
+	else
+		__raw_writel(0xffff, OMAP2430_PRCM_VOLTSETUP);
 	omap2_sram_reprogram_sdrc(level, dll_ctrl, m_type);
 	curr_perf_level = level;
 	local_irq_restore(flags);