dt-bindings: clock: Add RPMHCC for QDU1000 and QRU1000

Add compatible strings for RPMHCC for QDU1000 and QRU1000.

Signed-off-by: Melody Olvera <quic_molvera@quicinc.com>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221026190441.4002212-3-quic_molvera@quicinc.com