YAFFS2: cmd_yaffs2.c - fix build warnings

Fix these:
cmd_yaffs2.c: In function 'do_ywr':
cmd_yaffs2.c:69: warning: format '%x' expects type 'unsigned int', but argument 2 has type 'ulong'
cmd_yaffs2.c:69: warning: format '%x' expects type 'unsigned int', but argument 3 has type 'ulong'

Signed-off-by: Wolfgang Denk <wd@denx.de>

common/cmd_yaffs2.c

@@ -66,7 +66,7 @@ int do_ywr (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
     ulong value = simple_strtoul(argv[2], NULL, 16);
     ulong numValues = simple_strtoul(argv[3], NULL, 16);
 
-    printf ("Writing value (%x) %x times to %s... ", value, numValues, filename);
+    printf ("Writing value (%lx) %lx times to %s... ", value, numValues, filename);
 
     cmd_yaffs_write_file(filename,value,numValues);