powerpc32: Remove one insn in mulhdu

Remove one instruction in mulhdu
Signed-off-by: NChristophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: NScott Wood <oss@buserror.net>

arch/powerpc/kernel/misc_32.S

@@ -91,17 +91,16 @@ _GLOBAL(mulhdu)
 	addc	r7,r0,r7
 	addze	r4,r4
 1:	beqlr	cr1		/* all done if high part of A is 0 */
-	mr	r10,r3
 	mullw	r9,r3,r5
-	mulhwu	r3,r3,r5
+	mulhwu	r10,r3,r5
 	beq	2f
-	mullw	r0,r10,r6
-	mulhwu	r8,r10,r6
+	mullw	r0,r3,r6
+	mulhwu	r8,r3,r6
 	addc	r7,r0,r7
 	adde	r4,r4,r8
-	addze	r3,r3
+	addze	r10,r10
 2:	addc	r4,r4,r9
-	addze	r3,r3
+	addze	r3,r10
 	blr
 
 /*