clk: msm: gdsc: Add qcom,force-enable-root-clk DT property

In some cases, the core root clock needs to be force enabled
prior to turning on the core. Once the GDSC is enabled, the
root clock will be force disabled.

Change-Id: I344dcc66a0bce3a38405833aff2e16452f0a0fef
Signed-off-by: Deepak Katragadda <dkatraga@codeaurora.org>