obmc-init.sh: Fix FS type in mount failure message

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
diff --git a/common/recipes-phosphor/obmc-phosphor-initfs/files/obmc-init.sh b/common/recipes-phosphor/obmc-phosphor-initfs/files/obmc-init.sh
index 6750de3..9674765 100644
--- a/common/recipes-phosphor/obmc-phosphor-initfs/files/obmc-init.sh
+++ b/common/recipes-phosphor/obmc-phosphor-initfs/files/obmc-init.sh
@@ -114,7 +114,7 @@
 	msg="$(cat)" << HERE
 
 Mounting read-write $rwdev filesystem failed.  Please fix and run
-	mount $rwdev $rwdir -t $rwfs -o $rwopts
+	mount $rwdev $rwdir -t $rwfst -o $rwopts
 to to continue, or do change nothing to run from RAM for this boot.
 HERE
 	debug_takeover "$msg"