arm: mach-k3: Move R5 specific code into new r5/ directory

This makes it clear these are only to be used by the R5 builds of SPL.
And this will be used to later more cleanly split the two builds.

Signed-off-by: Andrew Davis <afd@ti.com>

arch/arm/mach-k3/Makefile

@@ -3,12 +3,8 @@
 # Copyright (C) 2017-2018 Texas Instruments Incorporated - https://www.ti.com/
 #	Lokesh Vutla <lokeshvutla@ti.com>
 
-obj-$(CONFIG_SOC_K3_J721E) += j721e/ j7200/
+obj-$(CONFIG_CPU_V7R) += r5/
-obj-$(CONFIG_SOC_K3_J721S2) += j721s2/
-obj-$(CONFIG_SOC_K3_AM625) += am62x/
-obj-$(CONFIG_SOC_K3_AM62A7) += am62ax/
 obj-$(CONFIG_ARM64) += arm64-mmu.o
-obj-$(CONFIG_CPU_V7R) += r5_mpu.o lowlevel_init.o
 obj-$(CONFIG_ARM64) += cache.o
 obj-$(CONFIG_OF_LIBFDT) += common_fdt.o
 ifeq ($(CONFIG_OF_LIBFDT)$(CONFIG_OF_SYSTEM_SETUP),yy)

arch/arm/mach-k3/r5/Makefile

@@ -0,0 +1,13 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright (C) 2023 Texas Instruments Incorporated - https://www.ti.com/
+#	Andrew Davis <afd@ti.com>
+
+obj-$(CONFIG_SOC_K3_J721E) += j721e/
+obj-$(CONFIG_SOC_K3_J721E) += j7200/
+obj-$(CONFIG_SOC_K3_J721S2) += j721s2/
+obj-$(CONFIG_SOC_K3_AM625) += am62x/
+obj-$(CONFIG_SOC_K3_AM62A7) += am62ax/
+
+obj-y += lowlevel_init.o
+obj-y += r5_mpu.o

arch/arm/mach-k3/r5/r5_mpu.c

@@ -6,9 +6,10 @@
  *	Lokesh Vutla <lokeshvutla@ti.com>
  */
 
+#include <config.h>
 #include <asm/io.h>
 #include <linux/kernel.h>
-#include "common.h"
+#include <asm/armv7_mpu.h>
 
 struct mpu_region_config k3_mpu_regions[16] = {
 	/*