[ARM] OMAP2 PRCM: clean up CM_IDLEST bits

This patch fixes a few OMAP2xxx CM_IDLEST bits that were incorrectly
marked as being OMAP2xxx-wide, when they were actually 2420-specific.

Also, originally when the PRCM register macros were defined, bit shift
macros used a "_SHIFT" suffix, and mask macros used none.  This became
a source of bugs and confusion, as the mask macros were mistakenly
used for shift values.  Gradually, the mask macros have been updated,
piece by piece, to add a "_MASK" suffix on the end to clarify.  This
patch applies this change to the CM_IDLEST_* register bits.

The patch also adds a few bits that were missing, mostly from the 3430ES1
to ES2 revisions.

linux-omap source commits are d18eff5b5fa15e170794397a6a94486d1f774f77,
e1f1a5cc24615fb790cc763c96d1c5cfe6296f5b, and part of
9fe6b6cf8d9e0cbb429fd64553a4b3160a9e99e1

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>