uboot-phytec

mmc: am654_sdhci: Get Xin clock by name

Get clk_xin by name instead of by index to avoid having to put clocks in
the same order in all devices.

Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>