[FSL P5020 P5040 PPC] Onboard SD card doesn't work anymore after the 'mmc-v5.4-2' updates

[Christian Zigotzky]

Hi All,

We still need the attached patch for our onboard SD card interface 
[1,2]. Could you please add this patch to the tree?

Thanks,
Christian

[1] https://www.spinics.net/lists/linux-mmc/msg56211.html
[2] 
http://forum.hyperion-entertainment.com/viewtopic.php?f=58&t=4349&start=20#p49012

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