MAINTAINERS: update NVM EXPRESS DRIVER file list

There isn't an nvme.c file any more.  It has been split into multiple
files.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>

MAINTAINERS

@@ -5740,7 +5740,7 @@ M:	Matthew Wilcox <willy@linux.intel.com>
 L:	linux-nvme@lists.infradead.org
 T:	git git://git.infradead.org/users/willy/linux-nvme.git
 S:	Supported
-F:	drivers/block/nvme.c
+F:	drivers/block/nvme*
 F:	include/linux/nvme.h
 
 OMAP SUPPORT