fs/Makefile: Stupid typo breakage of exofs inclusion

In my last patch I did a stupid mistake and broke the exofs
compilation completely. Fix it ASAP.

Instead of obj-y I did obj-$(y)

Really Really sorry. Me totally blushing :-{|
Signed-off-by: NBoaz Harrosh <bharrosh@panasas.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

fs/Makefile

@@ -120,6 +120,6 @@ obj-$(CONFIG_DEBUG_FS)		+= debugfs/
 obj-$(CONFIG_OCFS2_FS)		+= ocfs2/
 obj-$(CONFIG_BTRFS_FS)		+= btrfs/
 obj-$(CONFIG_GFS2_FS)           += gfs2/
-obj-$(y)          		+= exofs/ # Multiple mods, used by nfs/objlayout
+obj-y				+= exofs/ # Multiple modules
 obj-$(CONFIG_CEPH_FS)		+= ceph/
 obj-$(CONFIG_PSTORE)		+= pstore/