ARM: OMAP4+: PRM: move omap_prm_base_init under OMAP4 PRM driver

There is no need to call this separately from io.c, rather this can be
done commonly under the PRM driver.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
diff --git a/arch/arm/mach-omap2/prm44xx.c b/arch/arm/mach-omap2/prm44xx.c
index 1af0137..6f647f6 100644
--- a/arch/arm/mach-omap2/prm44xx.c
+++ b/arch/arm/mach-omap2/prm44xx.c
@@ -705,6 +705,8 @@
 
 int __init omap44xx_prm_init(void)
 {
+	omap_prm_base_init();
+
 	if (cpu_is_omap44xx() || soc_is_omap54xx() || soc_is_dra7xx())
 		prm_features |= PRM_HAS_IO_WAKEUP;