mmc: am654_sdhci: Set ENDLL=1 for DDR52 mode

According to the device datasheet [0], ENDLL=1 for
DDR52 mode, so call am654_sdhci_setup_dll() and write
itapdly after since we do not carry out tuning.

[0] https://www.ti.com/lit/ds/symlink/am62p.pdf



Fixes: c964447e ("mmc: am654_sdhci: Add support for input tap delay")
Signed-off-by: Judith Mendez <jm@ti.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>