UBIFS: remove Kconfig debugging option

Have the debugging stuff always compiled-in instead. It simplifies maintanance
a lot.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
diff --git a/fs/ubifs/Makefile b/fs/ubifs/Makefile
index 4878614..2c6f0cb 100644
--- a/fs/ubifs/Makefile
+++ b/fs/ubifs/Makefile
@@ -3,6 +3,4 @@
 ubifs-y += shrinker.o journal.o file.o dir.o super.o sb.o io.o
 ubifs-y += tnc.o master.o scan.o replay.o log.o commit.o gc.o orphan.o
 ubifs-y += budget.o find.o tnc_commit.o compress.o lpt.o lprops.o
-ubifs-y += recovery.o ioctl.o lpt_commit.o tnc_misc.o xattr.o
-
-ubifs-$(CONFIG_UBIFS_FS_DEBUG) += debug.o
+ubifs-y += recovery.o ioctl.o lpt_commit.o tnc_misc.o xattr.o debug.o