pktcdvd: mark as unmaintained and deprecated

This driver is both orphaned, and not really useful anymore. Mark
it as such, and remove it in a future kernel after a release or
two.

Signed-off-by: Jens Axboe <[e-mail]>

MAINTAINERS

···
 F:      arch/mips/configs/pistachio*_defconfig
 
 PKTCDVD DRIVER
-M:	Jiri Kosina <[e-mail]>
-S:	Maintained
+S:	Orphan
+M:	[e-mail]
 F:	drivers/block/pktcdvd.c
 F:	include/linux/pktcdvd.h
 F:	include/uapi/linux/pktcdvd.h

drivers/block/Kconfig

···
 	  allocated from highmem (only a problem for highmem systems).
 
 config CDROM_PKTCDVD
-	tristate "Packet writing on CD/DVD media"
+	tristate "Packet writing on CD/DVD media (DEPRECATED)"
 	depends on !UML
 	help
+	  Note: This driver is deprecated and will be removed from the
+	  kernel in the near future!
+
 	  If you have a CDROM/DVD drive that supports packet writing, say
 	  Y to include support. It should work with any MMC/Mt Fuji
 	  compliant ATAPI or SCSI drive, which is just about any newer