HSD #14015549974: sdhci-cadence: agilex5: Enable PHY input from device tree

commit 8f5687bcedfbabb59f2109376c8b2b4980b5192f from
https://github.com/altera-opensource/linux-socfpga.git



Retrieve the PHY value settings from values set in device tree to program.
Different set of PHY values are needed for different SDMMC speed.

Signed-off-by: Kah Jing Lee <kah.jing.lee@intel.com>
Signed-off-by: Liwei Song <liwei.song@windriver.com>