[PATCH] Alpha: strncpy() fix

As it turned out after recent SCSI changes, strncpy() was broken -
it mixed up the return values from __stxncpy() in registers $24 and $27.

Thanks to Mathieu Chouquet-Stringer for tracking down the problem
and providing an excellent test case.
Signed-off-by: NIvan Kokshaysky <ink@jurassic.park.msu.ru>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

arch/alpha/lib/strncpy.S

@@ -43,8 +43,8 @@ strncpy:
 
 	.align	4
 $multiword:
-	subq	$24, 1, $2	# clear the final bits in the prev word
-	or	$2, $24, $2
+	subq	$27, 1, $2	# clear the final bits in the prev word
+	or	$2, $27, $2
 	zapnot	$1, $2, $1
 	subq	$18, 1, $18
 
@@ -70,8 +70,8 @@ $multiword:
 	bne	$18, 0b
 
 1:	ldq_u	$1, 0($16)	# clear the leading bits in the final word
-	subq	$27, 1, $2
-	or	$2, $27, $2
+	subq	$24, 1, $2
+	or	$2, $24, $2
 
 	zap	$1, $2, $1
 	stq_u	$1, 0($16)