nvmet: add another maintainer

Sagi and I have been pretty busy lately, and Chaitanya has been
helping a lot with target work and agreed to share the load.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NKeith Busch <kbusch@kernel.org>

MAINTAINERS

@@ -11633,6 +11633,7 @@ F:	drivers/nvme/target/fcloop.c
 NVM EXPRESS TARGET DRIVER
 M:	Christoph Hellwig <hch@lst.de>
 M:	Sagi Grimberg <sagi@grimberg.me>
+M:	Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
 L:	linux-nvme@lists.infradead.org
 T:	git://git.infradead.org/nvme.git
 W:	http://git.infradead.org/nvme.git