clk: qcom: gcc-ipq9574: Clean up included headers

clk: qcom: gcc-ipq9574: Clean up included headers

Some included headers aren't actually used anywhere, while other headers
with the declaration of functions and structures aren't directly included.

Get rid of the unused ones, and add the ones that should be included
directly.

Signed-off-by: Devi Priya <quic_devipriy@quicinc.com>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230425084010.15581-4-quic_devipriy@quicinc.com