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For 8625 2.0 PLL4 is capable to run at 1.4GHz. Add acpuclock
table for the same and also add support to dynamically
re-program the PLL4 assuming 801.6MHz jump is fine from
H/W perspective.

Change-Id: I3712907d4aa3f4c085f874652797e9e7d4203598
Signed-off-by: Kaushal Kumar <kaushalk@codeaurora.org>