msm: acpuclock-krait-debug: Correct a couple of style issues

1) l2_acg_en_val[] need not be an array since only one index is used
2) The 'cpmr0' CP15 register was mislabelled 'l2cpdr'. Fix it.

Change-Id: I5b82aaf1f31a14e566903408d97e889111efb425
Signed-off-by: Matt Wagantall <mattw@codeaurora.org>