clk: Add support to print parent clock names during suspend

When debug_suspend is set to true and the low power code invokes
the function to print the enabled clocks, add support to print
enabled clock names along with their parent names if the
parent_print flag value is set, otherwise print the enabled
clocks only.

Change-Id: I4566f03cc11f323b27721e412f12034372a1f076
Signed-off-by: Shefali Jain <shefjain@codeaurora.org>