arm64: Select ARCH_HAS_OPP on MSM chipsets

MSM kernels make use of the OPP framework to associate
devices with operating power points. Select the ARCH_HAS_OPP
configuration option.

Change-Id: Iecfe40100d8f20edef6513bdbac58f9cebfdcbc4
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>