ram: Add driver for MPC83xx

Add a RAM driver for the MPC83xx architecture.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Mario Six <mario.six@gdsys.cc>
diff --git a/drivers/ram/Kconfig b/drivers/ram/Kconfig
index 496e2b7..54bb4b4 100644
--- a/drivers/ram/Kconfig
+++ b/drivers/ram/Kconfig
@@ -34,4 +34,13 @@
 	  support external memories like sdram, psram & nand.
 	  This driver is for the sdram memory interface with the FMC.
 
+config MPC83XX_SDRAM
+	bool "Enable MPC83XX SDRAM support"
+	depends on RAM
+	help
+	  Enable support for the internal DDR Memory Controller of the MPC83xx
+	  family of SoCs. Both static configurations, as well as configuring
+	  the RAM through the use of SPD (Serial Presence Detect) is supported
+	  via device tree settings.
+
 source "drivers/ram/stm32mp1/Kconfig"