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/Makefile b/drivers/ram/Makefile
index 2b9429c..b281129 100644
--- a/drivers/ram/Makefile
+++ b/drivers/ram/Makefile
@@ -24,3 +24,5 @@
 obj-$(CONFIG_SPL_STARFIVE_DDR) += starfive/
 endif
 obj-$(CONFIG_ARCH_OCTEON) += octeon/
+
+obj-$(CONFIG_CADENCE_DDR_CTRL) += cadence/