OMAP4: prm: Remove wrong clockdomain offsets

The following commit introduced new macros to define an offset
per clock domain in an instance.

commit e4156ee5

    OMAP4: CM instances: add clockdomain register offsets

The PRM contains only two clock controls management entities:
EMU and WKUP.
Remove the other ones.

Signed-off-by: Benoit Cousson <b-cousson@ti.com>
Cc: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>