phy: qcom-qmp-pcie-msm8996: drop unused in-layout configuration

The MSM8996 QMP PCIe PHY driver no longer uses the "in-layout"
configuration macro to configure registers that are typically accessed
using "regs_layout" arrays (e.g. QPHY_START_CTRL) so drop this unused
feature.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>