phy: qcom-qmp: move QSERDES PLL registers to separate header

Move QSERDES PLL registers to the separate header. This register set is
unique for the IPQ PCIe Gen3 PHYs.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20220705094320.1313312-13-dmitry.baryshkov@linaro.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>