phy: qcom-qmp-combo: drop unused in-layout configuration

The QMP combo PHY driver does not use 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>