fix(drivers/rcar3): fix CPG registers redefinition

This commit deletes the value of the redefined CPG register.

Signed-off-by: Toshiyuki Ogasahara <toshiyuki.ogasahara.bo@hitachi.com>
Signed-off-by: Yoshifumi Hosoya <yoshifumi.hosoya.wj@renesas.com>
Change-Id: I05cf4a449ae28adb2ddd59593971a7d0cbcb21de
diff --git a/drivers/renesas/common/common.c b/drivers/renesas/common/common.c
index 9b7c1eb..a0aa480 100644
--- a/drivers/renesas/common/common.c
+++ b/drivers/renesas/common/common.c
@@ -1,11 +1,12 @@
 /*
- * Copyright (c) 2018-2020, Renesas Electronics Corporation. All rights reserved.
+ * Copyright (c) 2018-2021, Renesas Electronics Corporation. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
 #include <lib/mmio.h>
 
+#include "cpg_registers.h"
 #include "rcar_private.h"
 
 #if IMAGE_BL31
@@ -16,7 +17,7 @@
 {
 	uint32_t value = regval;
 
-	mmio_write_32((uintptr_t) RCAR_CPGWPR, ~value);
+	mmio_write_32(CPG_CPGWPR, ~value);
 	mmio_write_32(regadr, value);
 }