msm: clock: Add 63.16 MHz rate to UART clocks

The 4MBps UART baud rate requires a frequency of 63.16
MHz on the UART clocks. Add this frequency.

CRs-Fixed: 573462
Change-Id: I2481d7e0b7177ed884c3124fb6c56ac98385e31a
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>