ARM: dts: msm: enable clk_div check based on hw version

Based on hw version the tick count needs to be converted to micro
second. Hw version of AVTIMER in 8916/8939 is V2. It is configured
to generate 27 MHz tick. So the ticks read from registers needs to
be divided by 27 for micro-sec.

CRs-Fixed: 689849
Change-Id: Ie1155572596861f6739a4dd585a2307109180aaf
Signed-off-by: Asish Bhattacharya <asishb@codeaurora.org>