dt-bindings: clock: split qcom,gcc-ipq4019 to separate file

Move schema for the GCC on IPQ4019 platform to a separate file to be able
to allow passing XO and sleep clks directly to GCC.

Signed-off-by: Robert Marko <robert.marko@sartura.hr>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230214162325.312057-1-robert.marko@sartura.hr