ls2k set pwm to gpio, gpio21, gpio22 to 1.

Change-Id: I6ce87c675d5efd8679e5b3176ed60de2ea93f16f
Signed-off-by: QiaoChong <qiaochong@loongson.cn>

Targets/LS2K/ls2k/tgt_machdep.c

@@ -261,6 +261,10 @@ void initmips(unsigned long long  raw_memsz)
 	ls2h_m25p_probe();
 #endif
 #endif
+ /*set pwm1,2 to gpio, gpio21, gpio22 to 1*/
+ *(volatile int *)0xbfe10420 &= ~(0x6<<12);
+ *(volatile int *)0xbfe10500 &= ~(0x3<<21);
+ *(volatile int *)0xbfe10510 |= 0x3<<21;
 #ifdef DTB
 	verify_dtb();
 #endif