pico-imx6ul: Fix eMMC boot after DM_MMC conversion
After the DM_MMC conversion the following eMMC boot error is observed: U-Boot SPL 2019.04-rc4 (Mar 20 2019 - 18:53:28 +0000) Trying to boot from MMC1 MMC Device 0 not found spl: could not find mmc device 0. error: -19 SPL: failed to boot from all boot devices ### ERROR ### Please RESET the board ### This happens because the SPL code does not initialize the SDHC pins and clock. Fix it by moving the original eMMC initialization from U-Boot proper to SPL. Reported-by: NOtavio Salvador <otavio@ossystems.com.br> Signed-off-by: NFabio Estevam <festevam@gmail.com> Tested-by: NFabio Berton <fabio.berton@ossystems.com.br> Reviewed-by: NOtavio Salvador <otavio@ossystems.com.br>
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