ARM: mach-airoha: Rework support and directory structure

Having a platform need a mach-* directory should be seen as a negative,
it means the platform needs special non-standard handling. ARM64 support
does not allow mach-* directories at all. While we may not get to that
given all the non-standard architectures we support, we should still try
to get as close as we can and reduce the number of mach directories.

The mach-airoha/ directory, and files within, provide just one "feature":
having the kernel print the machine name if the DTB does not also contain
a "model" string (which they always do). To reduce the number of mach-*
directories let's do without that feature and remove this directory.

It also seems there was a copy/paste error and the "MEDIATEK_DT"
name was re-used in the DT_MACHINE_START macro. This may have caused
conflicts if this was built in a multi-arch configuration.

NOTE: The default l2c_aux_mask is now ~0 but these devices never have
this type of cache controller so this is safe.
Signed-off-by: Andrew Davis <afd@ti.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/Kconfig

@@ -342,17 +342,6 @@ config ARCH_MULTIPLATFORM
 
 source "arch/arm/Kconfig.platforms"
 
-config ARCH_AIROHA
-	bool "Airoha SoC Support"
-	depends on ARCH_MULTI_V7
-	select ARM_AMBA
-	select ARM_GIC
-	select ARM_GIC_V3
-	select ARM_PSCI
-	select HAVE_ARM_ARCH_TIMER
-	help
-	  Support for Airoha EN7523 SoCs
-
 #
 # This is sorted alphabetically by mach-* pathname.  However, plat-*
 # Kconfigs may be included either alphabetically (according to the

arch/arm/Kconfig.platforms

@@ -67,6 +67,17 @@ config ARCH_VIRT
 	select ARM_PSCI
 	select HAVE_ARM_ARCH_TIMER
 
+config ARCH_AIROHA
+	bool "Airoha SoC Support"
+	depends on ARCH_MULTI_V7
+	select ARM_AMBA
+	select ARM_GIC
+	select ARM_GIC_V3
+	select ARM_PSCI
+	select HAVE_ARM_ARCH_TIMER
+	help
+	  Support for Airoha EN7523 SoCs
+
 config MACH_ASM9260
 	bool "Alphascale ASM9260"
 	depends on ARCH_MULTI_V5

arch/arm/Makefile

@@ -167,7 +167,6 @@ textofs-$(CONFIG_ARCH_AXXIA) := 0x00308000
 # Machine directory name.  This list is sorted alphanumerically
 # by CONFIG_* macro name.
 machine-$(CONFIG_ARCH_ACTIONS)		+= actions
-machine-$(CONFIG_ARCH_AIROHA)		+= airoha
 machine-$(CONFIG_ARCH_ALPINE)		+= alpine
 machine-$(CONFIG_ARCH_ARTPEC)		+= artpec
 machine-$(CONFIG_ARCH_ASPEED)           += aspeed

arch/arm/mach-airoha/Makefile

-# SPDX-License-Identifier: GPL-2.0-only
-obj-y			+= airoha.o

arch/arm/mach-airoha/airoha.c

-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Device Tree support for Airoha SoCs
- *
- * Copyright (c) 2022 Felix Fietkau <nbd@nbd.name>
- */
-#include <asm/mach/arch.h>
-
-static const char * const airoha_board_dt_compat[] = {
-	"airoha,en7523",
-	NULL,
-};
-
-DT_MACHINE_START(MEDIATEK_DT, "Airoha Cortex-A53 (Device Tree)")
-	.dt_compat	= airoha_board_dt_compat,
-MACHINE_END