nvme-fabrics: Add FC transport LLDD api definitions

Host:
 - LLDD registration with the host transport
 - registering host ports (local ports) and target ports seen on
   fabric (remote ports)
 - Data structures and call points for FC-4 LS's and FCP IO requests

Target:
 - LLDD registration with the target transport
 - registering nvme subsystem ports (target ports)
 - Data structures and call points for reception of FC-4 LS's and
   FCP IO requests, and callbacks to perform data and rsp transfers
   for the io.

Add to MAINTAINERS file

Signed-off-by: James Smart <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Reviewed-by: Jay Freyensee <[email protected]>
Reviewed-by: Johannes Thumshirn <[email protected]>
Signed-off-by: Christoph Hellwig <[email protected]>

Author: jsmart-gh

MAINTAINERS

@@ -8664,6 +8664,7 @@ M:	James Smart <[email protected]>
 L:	[email protected]
 S:	Supported
 F:	include/linux/nvme-fc.h
+F:	include/linux/nvme-fc-driver.h
 
 NVMEM FRAMEWORK
 M:	Srinivas Kandagatla <[email protected]>