ARM: OMAP5: clock: Add the prcm register changes required for ES2.0

PRCM register addresses are changed from ES1.0 to ES2.0 due to
PER power domain getting moved to CORE power domain.

So adding the nessecary register changes for the same.

Signed-off-by: R Sricharan <r.sricharan@ti.com>
Reviewed-by: Tom Rini <trini@ti.com>
Cc: Tom Rini <trini@ti.com>