MAINTAINERS: Remove Ram Amrani from Q-Logic RDMA driver

Remove myself from maintaining the qedr module as my period
of working with Cavium/Q-Logic has come to an end. I've had
a pleasure working with the community, cheers!

Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>