edac, highbank: Add MAINTAINERS entry
edac, highbank: Add MAINTAINERS entry

So taking over maintainership for the EDAC highbank driver.

Signed-off-by: Robert Richter <e7d65c7acdb3af2b58e7a70ccfb56006f2db84f1@kernel.org>
Acked-by: Borislav Petkov <0691a664b24b6f15b20cd5aee64b72271db08be1@suse.de>
Acked-by: Rob Herring <aa00819e304141d872f2e4b1c4be422ea3abbfe1@calxeda.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs