ARM: dts: msm: Add clock properties to GDSC on MSM8909

Some GDSCs need to manipulate clock states when powering on/off
their power domains. Add corresponding clock properties to
device tree node.

Change-Id: I5cb6c076e0221ca4660c9fdbf838d681ff2e176b
Signed-off-by: Taniya Das <tdas@codeaurora.org>