disk: part: fix typo

%s/Desriptor/Descriptor/g

Fix lines over 80 characters with said typo.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/disk/part_mac.c b/disk/part_mac.c
index b6c082e..d597dcf 100644
--- a/disk/part_mac.c
+++ b/disk/part_mac.c
@@ -47,7 +47,10 @@
 	ulong i, n;
 
 	if (part_mac_read_ddb (dev_desc, ddesc)) {
-		/* error reading Driver Desriptor Block, or no valid Signature */
+		/*
+		 * error reading Driver Descriptor Block,
+		 * or no valid Signature
+		 */
 		return (-1);
 	}
 
@@ -71,7 +74,10 @@
 	ldiv_t mb, gb;
 
 	if (part_mac_read_ddb (dev_desc, ddesc)) {
-		/* error reading Driver Desriptor Block, or no valid Signature */
+		/*
+		 * error reading Driver Descriptor Block,
+		 * or no valid Signature
+		 */
 		return;
 	}
 
@@ -153,7 +159,7 @@
 			     mac_driver_desc_t *ddb_p)
 {
 	if (blk_dread(dev_desc, 0, 1, (ulong *)ddb_p) != 1) {
-		printf ("** Can't read Driver Desriptor Block **\n");
+		printf("** Can't read Driver Descriptor Block **\n");
 		return (-1);
 	}