ubifs: Fix build issues reported using LLVM

Self assignments are reported as errors using LLVM
toolchain, fix them.

Change-Id: Idbbbeb5dff6f9874a66590c7fa01361e28a8ba12
Signed-off-by: Shiraz Hashim <shashim@codeaurora.org>
diff --git a/fs/ubifs/recovery.c b/fs/ubifs/recovery.c
index 586d593..3af4472 100644
--- a/fs/ubifs/recovery.c
+++ b/fs/ubifs/recovery.c
@@ -442,7 +442,6 @@
 {
 	int empty_offs, pad_len;
 
-	lnum = lnum;
 	dbg_rcvry("cleaning corruption at %d:%d", lnum, *offs);
 
 	ubifs_assert(!(*offs & 7));
diff --git a/fs/ubifs/scan.c b/fs/ubifs/scan.c
index aab8734..16f03d9 100644
--- a/fs/ubifs/scan.c
+++ b/fs/ubifs/scan.c
@@ -175,7 +175,6 @@
 void ubifs_end_scan(const struct ubifs_info *c, struct ubifs_scan_leb *sleb,
 		    int lnum, int offs)
 {
-	lnum = lnum;
 	dbg_scan("stop scanning LEB %d at offset %d", lnum, offs);
 	ubifs_assert(offs % c->min_io_size == 0);