armv8: lx2160a: fix reset sequence

Make sure that SW_RST_REQ and RST_REQ_MSK are cleared
before triggering hardware reset request.
Signed-off-by: Thirupathaiah Annapureddy <thiruan@linux.microsoft.com>
Signed-off-by: Meenakshi Aggarwal <meenakshi.aggarwal@nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>

arch/arm/cpu/armv8/fsl-layerscape/cpu.c

 // SPDX-License-Identifier: GPL-2.0+
 /*
- * Copyright 2017-2019 NXP
+ * Copyright 2017-2020 NXP
  * Copyright 2014-2015 Freescale Semiconductor, Inc.
  */
 
@@ -1229,13 +1229,15 @@ __efi_runtime_data u32 __iomem *rstcr = (u32 *)CONFIG_SYS_FSL_RST_ADDR;
 
 void __efi_runtime reset_cpu(ulong addr)
 {
-	u32 val;
-
 #ifdef CONFIG_ARCH_LX2160A
-	val = in_le32(rstcr);
-	val |= 0x01;
-	out_le32(rstcr, val);
+	/* clear the RST_REQ_MSK and SW_RST_REQ */
+	out_le32(rstcr, 0x0);
+
+	/* initiate the sw reset request */
+	out_le32(rstcr, 0x1);
 #else
+	u32 val;
+
 	/* Raise RESET_REQ_B */
 	val = scfg_in32(rstcr);
 	val |= 0x02;