arm: mvebu: Add Armada 38x SERDES / PHY init code from Marvell bin_hdr

This code is ported from the Marvell bin_hdr code into mainline
SPL U-Boot. It needs to be executed very early so that the devices
connected to the serdes PHY are configured correctly.

Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/arch/arm/mach-mvebu/serdes/a38x/Makefile b/arch/arm/mach-mvebu/serdes/a38x/Makefile
new file mode 100644
index 0000000..1503da8
--- /dev/null
+++ b/arch/arm/mach-mvebu/serdes/a38x/Makefile
@@ -0,0 +1,10 @@
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-$(CONFIG_SPL_BUILD)	= ctrl_pex.o
+obj-$(CONFIG_SPL_BUILD)	+= high_speed_env_spec.o
+obj-$(CONFIG_SPL_BUILD)	+= high_speed_env_spec-38x.o
+obj-$(CONFIG_SPL_BUILD)	+= high_speed_topology_spec-38x.o
+obj-$(CONFIG_SPL_BUILD)	+= seq_exec.o
+obj-$(CONFIG_SPL_BUILD)	+= sys_env_lib.o