m32r: build fix of entry.S

This patch fixes the following compile error:
<--  snip  -->
 ...
  AS      arch/m32r/kernel/entry.o
/home/bunk/linux/kernel-2.6/linux-2.6.23-rc3-mm1/arch/m32r/kernel/entry.S: Assembler messages:
/home/bunk/linux/kernel-2.6/linux-2.6.23-rc3-mm1/arch/m32r/kernel/entry.S:358: Error: bad instruction `addi r0,#(((((0)+(64))+(32))+(32)))'
make[2]: *** [arch/m32r/kernel/entry.o] Error 1
<--  snip  -->
Signed-off-by: NHirokazu Takata <takata@linux-m32r.org>
Cc: Adrian Bunk <bunk@kernel.org>

arch/m32r/kernel/entry.S

@@ -355,7 +355,7 @@ ENTRY(ei_handler)
 	lduh	r0, @(low(M32R_INT0ICU_ISTS),r0)	; bit10-6 : ISN
 	slli	r0, #21
 	srli	r0, #27				; ISN
-	addi	r0, #(M32R_INT0ICU_IRQ_BASE)
+	add3	r0, r0, #(M32R_INT0ICU_IRQ_BASE)
 	bra	check_end
 	.fillinsn
 4:
@@ -367,7 +367,7 @@ ENTRY(ei_handler)
 	lduh	r0, @(low(M32R_INT2ICU_ISTS),r0)	; bit10-6 : ISN
 	slli	r0, #21
 	srli	r0, #27				; ISN
-	addi	r0, #(M32R_INT2ICU_IRQ_BASE)
+	add3	r0, r0, #(M32R_INT2ICU_IRQ_BASE)
 	; bra	check_end
 	.fillinsn
 5: