msm: acpuclock-krait: Support alternate PVS and speed bin format

msm8974 and future targets use a different eFuse register layout
than targets from previous SoC generations. Instead of hard-coding
acpuclock-krait to assume the old format, allow the format to
be decided on a per-SoC basis via function pointer assignments.

Two formats are currently supported:
 - "Format A", used for 8974
 - "Format B", used for older Krait-based targets

Change-Id: Id9e8a6c83e3003f2b19ac56bb7aee5dc6b1d00cf
Signed-off-by: Matt Wagantall <mattw@codeaurora.org>

Conflicts:
	arch/arm/mach-msm/acpuclock-krait.c