MAINTAINERS: nfc: add Krzysztof Kozlowski as maintainer

The NFC subsystem is orphaned.  I am happy to spend some cycles to
review the patches, send pull requests and in general keep the NFC
subsystem running.
Signed-off-by: NKrzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Acked-by: NMark Greer <mgreer@animalcreek.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

MAINTAINERS

@@ -12896,8 +12896,9 @@ F:	include/uapi/linux/nexthop.h
 F:	net/ipv4/nexthop.c
 
 NFC SUBSYSTEM
+M:	Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
 L:	netdev@vger.kernel.org
-S:	Orphan
+S:	Maintained
 F:	Documentation/devicetree/bindings/net/nfc/
 F:	drivers/nfc/
 F:	include/linux/platform_data/nfcmrvl.h