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

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

Change-Id: Ifc6acdbd05398e2f501cdc2cfb8694b16eb9b866
Signed-off-by: Naveen Yadav <naveenky@codeaurora.org>