dt-bindings: clock: Add clock ID for HWKM & PKA clock for Scuba

HWKM & PKA clocks are required to be voted from the clients,
so add the relevant clock ids for the same.

Change-Id: If61293217dc2fc331603c0d0d0e1613016a9c3ac
Signed-off-by: Naveen Yadav <naveenky@codeaurora.org>