gdsc: Dump GDSC register state if operations time out

Dump GDSC register state if any of GDSC related operations time out.
This is necessary to debug GDSC issues when the register values
can't be recovered from ramdump.

Change-Id: I3175f9525ec6b72d3481919d490c767a056cbf05
Signed-off-by: Junjie Wu <junjiew@codeaurora.org>