MAINTAINERS: remove GR-everest-linux-l2@marvell.com

I've sent a patch to GR-everest-linux-l2@marvell.com few days ago and
got a reply from postmaster@marvell.com:

	Delivery has failed to these recipients or groups:

	gr-everest-linux-l2@marvell.com<mailto:gr-everest-linux-l2@marvell.com>
	The email address you entered couldn't be found. Please check the
	recipient's email address and try to resend the message. If the problem
	continues, please contact your helpdesk.

As requested by Alok Prasad, replacing GR-everest-linux-l2@marvell.com
with Manish Chopra's email address. [0]

Link: https://lore.kernel.org/all/20211116081601.11208-1-palok@marvell.com/

 [0]
Signed-off-by: Pavel Skripkin <paskripkin@gmail.com>
Link: https://lore.kernel.org/r/20211116141303.32180-1-paskripkin@gmail.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>