mmc: sdhci-of-dwcmshc: Change to dwcmshc_phy_init for reusing codes

dwcmshc_phy_1_8v_init and dwcmshc_phy_3_3v_init differ only by a few
lines of code. This allow us to reuse code depending on voltage.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/20250131025406.1753513-1-jh80.chung@samsung.com


Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>