ARM: dts: msm: Add clocks properties to GDSC nodes on SDM855

The multimedia GDSCs rely on the relevant gcc_<mm>_ahb_clk clocks
to be enabled for making any register accesses to toggle them.
While this is taken care of at most times by keeping the clocks
enabled from the peripheral driver, there is a brief juncture at
boot when the GDSC devices probe before the GCC driver can probe.
As a stop-gap measure, add clocks properties to these GDSC nodes
which would make sure that the GDSCs only probe after the clocks
have been registered and enabled.

Change-Id: Ia14c4ea7b71179c976531f44710f50f5d9ec8309
Signed-off-by: Deepak Katragadda <dkatraga@codeaurora.org>