scsi: fnic: Add support for fabric based solicited requests and responses

Add fdls_disc.c to support fabric based solicited requests and responses.

Clean up obsolete code but keep the function template so as to not break
compilation.

Remove duplicate definitions from header files.

Modify definitions of data members.

Reported-by: kernel test robot <[email protected]>
Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
Reviewed-by: Sesidhar Baddela <[email protected]>
Co-developed-by: Gian Carlo Boffa <[email protected]>
Signed-off-by: Gian Carlo Boffa <[email protected]>
Co-developed-by: Arulprabhu Ponnusamy <[email protected]>
Signed-off-by: Arulprabhu Ponnusamy <[email protected]>
Co-developed-by: Arun Easi <[email protected]>
Signed-off-by: Arun Easi <[email protected]>
Co-developed-by: Karan Tilak Kumar <[email protected]>
Signed-off-by: Karan Tilak Kumar <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Martin K. Petersen <[email protected]>

Author: Karan Tilak Kumar

drivers/scsi/fnic/Makefile

@@ -7,6 +7,7 @@ fnic-y	:= \
 	fnic_main.o \
 	fnic_res.o \
 	fnic_fcs.o \
+	fdls_disc.o \
 	fnic_scsi.o \
 	fnic_trace.o \
 	fnic_debugfs.o \