Patch merged into coreboot/master: sb/amd/sp5100: Add ehci_async_data_cache CMOS option

the following patch was just integrated into master:
commit 9ef671769bc5be393f356c85359909a56145a912
Author: Timothy Pearson 
Date:   Mon Apr 4 14:24:23 2016 -0500

sb/amd/sp5100: Add ehci_async_data_cache CMOS option

SP5100 devices are affected by an erratum that can lock up the
    EHCI ports under certain conditions.  Add an optional CMOS
    option to enable a workaround at the expense of performance.

Change-Id: I305d23dfa50f10a3dcb5c731e8923305c8956dde
    Signed-off-by: Timothy Pearson 
    Reviewed-on: https://review.coreboot.org/14241
    Tested-by: build bot (Jenkins)
    Tested-by: Raptor Engineering Automated Test Stand 
    Reviewed-by: Martin Roth

See https://review.coreboot.org/14241 for details.

-gerrit