MAINTAINERS: ONENAND: MTD: Mark Samsung's OneNAND as orphaned

Since I leave Samsung by the end of the year, I will not have access to
OneNAND devices anymore.

Hence the custodian position has been marked as "Orphaned".
Signed-off-by: NLukasz Majewski <l.majewski@samsung.com>

MAINTAINERS

@@ -392,8 +392,8 @@ T:	git git://git.denx.de/u-boot-nios.git
 F:	arch/nios2/
 
 ONENAND
-M:	Lukasz Majewski <l.majewski@samsung.com>
-S:	Maintained
+#M:	Lukasz Majewski <l.majewski@majess.pl>
+S:	Orphaned (Since 2017-01)
 T:	git git://git.denx.de/u-boot-onenand.git
 F:	drivers/mtd/onenand/