MAINTAINERS: Fix incorrect status tag

When I removed myself from the xilinx drivers I used the wrong tag. Fix
it.

Signed-off-by: Grant Likely <grant.likely@linaro.org>
diff --git a/MAINTAINERS b/MAINTAINERS
index 02064ac..ece5490 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -4986,7 +4986,7 @@
 
 LINUX FOR POWERPC EMBEDDED XILINX VIRTEX
 L:	linuxppc-dev@lists.ozlabs.org
-S:	Unmaintained
+S:	Orphan
 F:	arch/powerpc/*/*virtex*
 F:	arch/powerpc/*/*/*virtex*
 
@@ -9294,7 +9294,7 @@
 F:	drivers/net/ethernet/xilinx/xilinx_axienet*
 
 XILINX SYSTEMACE DRIVER
-S:	Unmaintained
+S:	Orphan
 F:	drivers/block/xsysace.c
 
 XILINX UARTLITE SERIAL DRIVER