dt-bindings: clock: Add support for clock ids for SDXNIGHTJAR

Add clock IDs for GCC and clients to be able to request
for clocks from these clock controllers.

Change-Id: Ib6de5e51c0561650d2942817fbe1b1a6c3fb5424
Signed-off-by: Taniya Das <tdas@codeaurora.org>