[Feature][ZXW-65]merged P49 base code

Change-Id: I3e09c0c3d47483bc645f02310380ecb7fc6f4041
diff --git a/ap/os/linux/linux-3.4.x/drivers/mfd/zx234290-irq.c b/ap/os/linux/linux-3.4.x/drivers/mfd/zx234290-irq.c
index 14980d8..1d466ee 100644
--- a/ap/os/linux/linux-3.4.x/drivers/mfd/zx234290-irq.c
+++ b/ap/os/linux/linux-3.4.x/drivers/mfd/zx234290-irq.c
@@ -110,7 +110,7 @@
 
 	buck_sts &= ~buck_mask;
 	ldo_sts &= ~ldo_mask;
-
+	buck_sts &=~(1<<ZX234290_LDO_RSTERR_LSH);//clear rst flag
 	if(buck_sts )
 		irq_sts |= (1 << ZX234290_INT_BUCK_FAUL);
 	else