ram: octeon: Add MIPS Octeon3 DDR4 support (part 3/3)

This Octeon 3 DDR driver is ported from the 2013 Cavium / Marvell U-Boot
repository. It currently supports DDR4 on Octeon 3. It can be later
extended to support also DDR3 and Octeon 2 platforms.

Part 3 includes the DIMM SPD handling code and the Kconfig / Makefile
integration.

Signed-off-by: Aaron Williams <awilliams@marvell.com>
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/drivers/ram/octeon/Makefile b/drivers/ram/octeon/Makefile
new file mode 100644
index 0000000..27649d1
--- /dev/null
+++ b/drivers/ram/octeon/Makefile
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Copyright (c) 2020 Marvell, Inc.
+#
+
+obj-$(CONFIG_RAM_OCTEON_DDR4) += octeon_ddr.o
+obj-$(CONFIG_RAM_OCTEON_DDR4) += octeon3_lmc.o
+obj-y += dimm_spd_eeprom.o