disk: part: fix typo

%g/rathen then/rather than/

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/disk/part.c b/disk/part.c
index f30f9e9..98cc54d 100644
--- a/disk/part.c
+++ b/disk/part.c
@@ -468,7 +468,7 @@
 
 #ifdef CONFIG_CMD_UBIFS
 	/*
-	 * Special-case ubi, ubi goes through a mtd, rathen then through
+	 * Special-case ubi, ubi goes through a mtd, rather than through
 	 * a regular block device.
 	 */
 	if (0 == strcmp(ifname, "ubi")) {