ls3a3000 7a add CPU_GPIO_SET option support.

Change-Id: I140c91a1092c78280243304c01ce17cf4a434c48
Signed-off-by: QiaoChong <qiaochong@loongson.cn>

Targets/Bonito3a3000_7a/Bonito/tgt_machdep.c

@@ -538,6 +538,11 @@ void tgt_devconfig()
 			vga_available = 0;
 	printf("vga available : %d\n", vga_available);
 #endif
+
+#ifdef CPU_GPIO_SET
+	*(volatile int *)0xbfe00120 &= ~CPU_GPIO_SET;
+	*(volatile int *)0xbfe0011c |= CPU_GPIO_SET;
+#endif
 	config_init();
 	configure();
 	gmac_mac_init();