drivers: renesas: rzg: Switch using common ddr code

Switch using common ddr driver code from renesas/common/ddr directory
for RZ/G2M SoC.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Change-Id: I807dcb0bc5186bd32bc1c577945d28634bb10e1f
diff --git a/drivers/renesas/rzg/qos/qos_init.h b/drivers/renesas/rzg/qos/qos_init.h
index 10f60e7..3d62744 100644
--- a/drivers/renesas/rzg/qos/qos_init.h
+++ b/drivers/renesas/rzg/qos/qos_init.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020, Renesas Electronics Corporation. All rights reserved.
+ * Copyright (c) 2020-2021, Renesas Electronics Corporation. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -8,6 +8,6 @@
 #define RZG_QOS_INIT_H
 
 void rzg_qos_init(void);
-uint8_t rzg_get_boardcnf_phyvalid(void);
+uint8_t get_boardcnf_phyvalid(void);
 
 #endif /* RZG_QOS_INIT_H */