clk: msm: gcc: Add support for 40MHz for SPI clocks for msm8917

SPI clocks require to support 40MHz frequency, so add
the support for same.

Change-Id: I2102302f8fb35b864daf5366f8c14e3e1ad6b9ee
Signed-off-by: Odelu Kukatla <okukatla@codeaurora.org>