arm: mach-k3: Move code specific to a SoC into that SoC's directory

Each SoC now has a directory in mach-k3, let's move the SoC specific
files into their respective directories.

Signed-off-by: Andrew Davis <afd@ti.com>
diff --git a/arch/arm/mach-k3/am62x/Makefile b/arch/arm/mach-k3/am62x/Makefile
index acf09c3..8494cdd 100644
--- a/arch/arm/mach-k3/am62x/Makefile
+++ b/arch/arm/mach-k3/am62x/Makefile
@@ -1,2 +1,5 @@
 # SPDX-License-Identifier:	GPL-2.0+
+
+obj-$(CONFIG_OF_SYSTEM_SETUP) += am625_fdt.o
+obj-$(CONFIG_SPL_BUILD) += am625_init.o
 obj-y += boot.o