ubifs: avoid assert failed in ubifs.c

This patch solves assert failed displayed in the console during a boot.
The root cause is that the ubifs_inode is not already allocated when
ubifs_printdir and ubifs_finddir functions are called.

Trace showing the issue:
feed 'boot.scr.uimg', ino 94, new f_pos 0x17b40ece
dent->ch.sqnum '7132', creat_sqnum 3886945402880
UBIFS assert failed in ubifs_finddir at 436
INODE ALLOCATION: creat_sqnum '7129'
Found U-Boot script /boot.scr.uimg

Signed-off-by: Christophe Kerello <christophe.kerello@st.com>
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
diff --git a/fs/ubifs/ubifs.c b/fs/ubifs/ubifs.c
index 8249879..47fa41a 100644
--- a/fs/ubifs/ubifs.c
+++ b/fs/ubifs/ubifs.c
@@ -349,7 +349,9 @@
 		dbg_gen("feed '%s', ino %llu, new f_pos %#x",
 			dent->name, (unsigned long long)le64_to_cpu(dent->inum),
 			key_hash_flash(c, &dent->key));
+#ifndef __UBOOT__
 		ubifs_assert(le64_to_cpu(dent->ch.sqnum) > ubifs_inode(dir)->creat_sqnum);
+#endif
 
 		nm.len = le16_to_cpu(dent->nlen);
 		over = filldir(c, (char *)dent->name, nm.len,
@@ -431,7 +433,9 @@
 		dbg_gen("feed '%s', ino %llu, new f_pos %#x",
 			dent->name, (unsigned long long)le64_to_cpu(dent->inum),
 			key_hash_flash(c, &dent->key));
+#ifndef __UBOOT__
 		ubifs_assert(le64_to_cpu(dent->ch.sqnum) > ubifs_inode(dir)->creat_sqnum);
+#endif
 
 		nm.len = le16_to_cpu(dent->nlen);
 		if ((strncmp(dirname, (char *)dent->name, nm.len) == 0) &&