ARM: dts: msm: Support the mmagic and core GDSC dependancies on msm8996

The mmagic core GDSCs should be turned on prior to enabling the
core GDSCs. Take care of that dependancy from within the GDSC
framework.

Change-Id: I4d68af1940849139e8047711ac47b88a4ea67536
Signed-off-by: Deepak Katragadda <dkatraga@codeaurora.org>