ram: renesas: dbsc5: Add V4H-3/V4H-5/V4H-7 OTP based detection

Add auto-detection and handling of Renesas R-Car V4H-3 and V4H-5
in addition to V4H-7 SoC variants based on OTP fuse programming.
The V4H-3 and V4H-5 variants have reduced DRAM frequency options.

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
diff --git a/drivers/ram/renesas/dbsc5/dbsc5.h b/drivers/ram/renesas/dbsc5/dbsc5.h
index c410eb0..bf22fcb 100644
--- a/drivers/ram/renesas/dbsc5/dbsc5.h
+++ b/drivers/ram/renesas/dbsc5/dbsc5.h
@@ -23,6 +23,7 @@
 struct renesas_dbsc5_data {
 	const char		*clock_node;
 	const char		*reset_node;
+	const char		*otp_node;
 };
 
 #endif /* __DRIVERS_RAM_RENESAS_DBSC5_DBSC5_H__ */