ram: renesas: dbsc5: Fix bitrate MD pin parsing

Fix copy paste error in MD pin handling for 5500 Mbps and 4800 Mbps case,
each should be handled by MD[19,17] == 2 and MD[19,17] == 3 respectively.

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
diff --git a/drivers/ram/renesas/dbsc5/dram.c b/drivers/ram/renesas/dbsc5/dram.c
index 210a68f..939775d 100644
--- a/drivers/ram/renesas/dbsc5/dram.c
+++ b/drivers/ram/renesas/dbsc5/dram.c
@@ -4450,10 +4450,10 @@
 	} else if (md == 1) {
 		priv->ddr_mbps = 6000;
 		priv->ddr_mbpsdiv = 1;
-	} else if (md == 1) {
+	} else if (md == 2) {
 		priv->ddr_mbps = 5500;
 		priv->ddr_mbpsdiv = 1;
-	} else if (md == 1) {
+	} else if (md == 3) {
 		priv->ddr_mbps = 4800;
 		priv->ddr_mbpsdiv = 1;
 	}