imx6ulz evk does not detect SD card

[Fabio Estevam]

Hi Peng and Ye Li,

Tested booting imx6ulz evk with mainline and noticed that the SD card
is not detected:

U-Boot 2020.01-rc5-00007-g7c4feb945a-dirty (Dec 20 2019 - 15:21:43 -0300)

CPU:   Freescale i.MX6ULL rev1.1 900 MHz (running at 396 MHz)
CPU:   Commercial temperature grade (0C to 95C) at 37C
Reset cause: POR
Model: Freescale i.MX6 ULZ 14x14 EVK Board
Board: MX6ULL 14x14 EVK
DRAM:  512 MiB
MMC:   FSL_SDHC: 0, FSL_SDHC: 1
Loading Environment from MMC... MMC: no card present
*** Warning - No block device, using default environment

Any ideas?

Thanks