phy: qcom-qmp-ufs: Refactor phy_power_on and phy_calibrate callbacks

Commit 052553af6a31 ("ufs/phy: qcom: Refactor to use phy_init call")
puts enabling regulators & clks, calibrating UFS PHY, starting serdes
and polling PCS ready status into phy_power_on.

In Current code regulators enable, clks enable, calibrating UFS PHY,
start_serdes and polling PCS_ready_status are part of phy_power_on.

UFS PHY registers are retained after power collapse, meaning calibrating
UFS PHY, start_serdes and polling PCS_ready_status can be done only when
hba is powered_on, and not needed every time when phy_power_on is called
during resume. Hence keep the code which enables PHY's regulators & clks
in phy_power_on and move the rest steps into phy_calibrate function.

Refactor the code to retain PHY regulators & clks in phy_power_on and
move out rest of the code to new phy_calibrate function.

Also move reset_control_assert to qmp_ufs_phy_calibrate to align
with Hardware programming guide.

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Co-developed-by: Can Guo <quic_cang@quicinc.com>
Signed-off-by: Can Guo <quic_cang@quicinc.com>
Signed-off-by: Nitin Rawat <quic_nitirawa@quicinc.com>
Link: https://lore.kernel.org/r/20250526153821.7918-5-quic_nitirawa@quicinc.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

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