linux-yocto/4.4: mmc backports
Backporting the following mcc commits to the 4.4 repo. These fix issues
being seen on broxton based boads:
1f3e98df094c mmc: core: Add a facility to "pause" re-tuning
b27fcd162327 mmc: block: Pause re-tuning while switched to the RPMB partition
9aa07b4e274e mmc: block: Always switch back to main area after RPMB access
Signed-off-by: California Sullivan <california.l.sullivan@intel.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
