[U-Boot] uhs-1 support in imx_esdhc.c file

[TigerLiu at via-alliance.com]

Hi, Haijun:
Freescale engineer had ever added UHS-I support in
drivers/mmc/imx_esdhc.c .
But I could not find imx_eshdc.c file in current latest u-boot package.

So, I have questions about UHS-I code:
1. UHS-I support has been merged into fsl_esdhc.c ?
2. Does freescale support UHS-II in u-boot code?

Best wishes,