msm: timer: Use 32768Hz GPT and SCLK on 8064 family

On 8064 SOC family, a dedicated XO is derived to support
sleep clock at 32768Hz unlike 8960 SOC family where TCXO
divider was used with effective freq. of 32765Hz.

CRs-fixed: 462079
Change-Id: I79142703c4ffac209f4dedeefebc235eeb8b140d
Signed-off-by: Jay Chokshi <jchokshi@codeaurora.org>