sh: fix trigger_address_error()

The function should set BL bit, but it should not clear other flags.
So, the patch uses set_bl_bit() instead of a local asm code.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/arch/sh/include/asm/system.h b/arch/sh/include/asm/system.h
index 56fd77a..24b5ce8 100644
--- a/arch/sh/include/asm/system.h
+++ b/arch/sh/include/asm/system.h
@@ -274,8 +274,8 @@
 
 static inline void trigger_address_error(void)
 {
+	set_bl_bit();
 	__asm__ __volatile__ (
-		"ldc %0, sr\n\t"
 		"mov.l @%1, %0"
 		:
 		: "r" (0x10000000), "r" (0x80000001)