MAINTAINERS: Clean up the RISC-V TCG backend section

The e-mail address mjc@sifive.com of Michael is not valid anymore.
Commit 7d04ac38959f8115f2a02 removed the entry already from the main
RISC-V section, but apparently forgot to remove it from the TCG
backend section, too.

Fixes: 7d04ac38959f8115f2a029d81db1c8aac179aa95
Reviewed-by: Palmer Dabbelt <palmer@sifive.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
1 file changed