msm: acpuclock-8960: Migrate 8960 support to use acpuclock-krait

Leverage the optimized code of the new acpuclock-krait driver for
8960. The newer driver is simpler and more efficient than the existing
acpuclock-8960 code, but drops support for Krait v1 processors (which
were not commercialized anyway).

Change-Id: I5cc875446f02a9f169c9997b716e0464a3a20ee1
Signed-off-by: Matt Wagantall <mattw@codeaurora.org>