ARM: dts: msm: Add back support for GDSCRs on MSM8909

The commit bfa9b60c ("ARM: dts: msm: Initial device tree changes for
MSM8909") had removed the GDSCR support for venus/vfe, add back the support
for the same.

Change-Id: I6c6a71ed7aa3a6376f876b9aa9c2fe6f592fe4e8
Signed-off-by: Taniya Das <tdas@codeaurora.org>