msm: acpuclock-8930{aa,ab}: Turn off inefficient frequencies

Given frequcies at the same voltage and the same L2 operating
point, the highest frequency is a more efficient choice. Update
the frequency tables for 8930, 8930aa, 8930ab to turn off the
inefficient frequencies.

Change-Id: I5048ecdd393836600444f45d39e5940e5fe7d106
Signed-off-by: Tianyi Gou <tgou@codeaurora.org>