ram: cadence: add driver for Cadence EDAC

Driver for Cadence EDAC DDR controller, as found in the Renesas RZ/N1.

Signed-off-by: Ralph Siemsen <ralph.siemsen@linaro.org>
Reviewed-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
diff --git a/drivers/ram/Kconfig b/drivers/ram/Kconfig
index 1acf212..bf99964 100644
--- a/drivers/ram/Kconfig
+++ b/drivers/ram/Kconfig
@@ -108,6 +108,7 @@
 	  This driver is for the sdram memory interface with the SEMC.
 
 source "drivers/ram/aspeed/Kconfig"
+source "drivers/ram/cadence/Kconfig"
 source "drivers/ram/rockchip/Kconfig"
 source "drivers/ram/sifive/Kconfig"
 source "drivers/ram/stm32mp1/Kconfig"