ram: starfive: fix typo for unsupported DDR size

Fix typo for "unsupport" size and improve description to Unknown DDR size.

Signed-off-by: E Shattow <e@freeshell.de>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>

drivers/ram/starfive/starfive_ddr.c

@@ -48,7 +48,7 @@ static int starfive_ddr_setup(struct udevice *dev, struct starfive_ddr_priv *pri
 		break;
 
 	default:
-		pr_err("unsupport size %lx\n", priv->info.size);
+		pr_err("Unknown DDR size %lx\n", priv->info.size);
 		return -EINVAL;
 	}