ls2k ejtag exception jump to 0x80008000.

Change-Id: I7b75050c11d54045335a15804489f24910de9b8d
Signed-off-by: Chong Qiao <qiaochong@loongson.cn>

Targets/LS2K/ls2k/start.S

@@ -300,6 +300,12 @@ ext_map_and_reboot:
 	b	exc_common
 	nop
 #endif
+	/* Debug exception */
+	.align  7           /* bfc00480 */
+	dmtc0 k0, $31
+	li k0, 0x80008000
+	jr k0
+	dmtc0 k0, $31
 #ifdef LS2K_STR
 	.align 8           /* bfc00500 */
 	.set mips64
@@ -433,9 +439,6 @@ ext_map_and_reboot:
 	b 1b
 	nop
 #endif
-	/* Debug exception */
-	.align  7           /* bfc00480 */
-#include "exc_ejtag.S"
 
 exc_common:
 	PRINTSTR("\r\nCAUSE=")