ram: add SDRAM driver for i.MXRT SoCs

Add SDRAM driver for i.MXRT SoCs.

Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
diff --git a/drivers/ram/Makefile b/drivers/ram/Makefile
index 4b77969..5c89741 100644
--- a/drivers/ram/Makefile
+++ b/drivers/ram/Makefile
@@ -15,3 +15,5 @@
 obj-$(CONFIG_K3_AM654_DDRSS) += k3-am654-ddrss.o
 obj-$(CONFIG_ARCH_MEDIATEK) += mediatek/
 obj-$(CONFIG_K3_J721E_DDRSS) += k3-j721e/
+
+obj-$(CONFIG_IMXRT_SDRAM) += imxrt_sdram.o