MMC: commit dba3c29 ruins mmc card data on beagle-xm revB

Hi,

After bisecting, I found that the commit below can ruin the mmc card data
(writing incorrect file, or fs is corrupt) on my beagle-xm revB, and reverting
the commit below will fix the problem.


commit dba3c29ea4a1d5d544f59b94fd8a41662135e071
Author: Balaji T K [off-list ref]
Date:   Mon Apr 9 12:08:32 2012 +0530

    mmc: omap_hsmmc: Enable Auto CMD12

    Enable Auto-CMD12 for multi block read/write on HSMMC.
    Tested on OMAP4430, OMAP3430 and OMAP2430 SDP


Thanks,
--
Ming Lei