ARM: OMAP2+: CM: determine CM base address from device tree

There is no need to provide the CM base address through a low-level API
from the low-level IO init, as this information is available through DT.
Re-routed the parsing function to be called from the CM drivers also to
simplify the implementation under io.c.

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

arch/arm/mach-omap2/cm2xxx.c

@@ -395,6 +395,7 @@ static struct cm_ll_data omap2xxx_cm_ll_data = {
 
 int __init omap2xxx_cm_init(void)
 {
+	omap2_cm_base_init();
 	return cm_register(&omap2xxx_cm_ll_data);
 }