MAINTAINERS: update email addresses of octeon_ep driver maintainers

Update email addresses of Marvell octeon_ep driver maintainers.
Also remove a former maintainer.

As a maintainer below are the responsibilities:
- Pushing the bug fixes and new features to upstream.
- Responsible for reviewing the external changes
  submitted for the octeon_ep driver.
- Reply to maintainers questions in a timely manner.
Signed-off-by: Sathesh Edara <sedara@marvell.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

MAINTAINERS

@@ -12552,7 +12552,7 @@ F:	drivers/mtd/nand/raw/marvell_nand.c
 
 MARVELL OCTEON ENDPOINT DRIVER
 M:	Veerasenareddy Burru <vburru@marvell.com>
-M:	Abhijit Ayarekar <aayarekar@marvell.com>
+M:	Sathesh Edara <sedara@marvell.com>
 L:	netdev@vger.kernel.org
 S:	Supported
 F:	drivers/net/ethernet/marvell/octeon_ep