arch/arm: Add a few ARM targets as supported by CLANG

Some targets cannot be supported by clang as clang generates slightly
larger binaries which the hardware won't accept. This is usually the
case with CONFIG_CHROMEOS.

Change-Id: I88cf8ce16fb6c61c19d615e396f5871179b06fc8
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/69747
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/arch/arm/Kconfig

@@ -2,7 +2,6 @@
 
 config ARCH_ARM
 	bool
-	select CLANG_UNSUPPORTED
 
 config ARCH_BOOTBLOCK_ARM
 	bool

src/soc/nvidia/tegra124/Kconfig

@@ -14,6 +14,8 @@ config SOC_NVIDIA_TEGRA124
 	select MAINBOARD_HAS_NATIVE_VGA_INIT
 	select MAINBOARD_FORCE_NATIVE_VGA_INIT
 	select HAVE_LINEAR_FRAMEBUFFER
+	# clang creates larger binaries that may not fit
+	select CLANG_UNSUPPORTED if CHROMEOS
 
 if SOC_NVIDIA_TEGRA124
 

src/soc/qualcomm/ipq40xx/Kconfig

@@ -9,6 +9,8 @@ config SOC_QC_IPQ40XX
 	select ARCH_RAMSTAGE_ARMV7
 	select HAVE_UART_SPECIAL
 	select GENERIC_GPIO_LIB
+# clang creates larger binaries that may not fit
+	select CLANG_UNSUPPORTED if CHROMEOS
 
 if SOC_QC_IPQ40XX
 

src/soc/qualcomm/ipq806x/Kconfig

@@ -10,6 +10,8 @@ config SOC_QC_IPQ806X
 	select HAVE_UART_SPECIAL
 	select GENERIC_GPIO_LIB
 	select NO_MONOTONIC_TIMER
+# clang creates larger binaries that may not fit
+	select CLANG_UNSUPPORTED if CHROMEOS
 
 if SOC_QC_IPQ806X
 

src/soc/rockchip/rk3288/Kconfig

@@ -18,6 +18,8 @@ config SOC_ROCKCHIP_RK3288
 	select NO_BOOTBLOCK_CONSOLE
 	select NO_FMAP_CACHE
 	select NO_CBFS_MCACHE
+# clang creates larger binaries that may not fit
+	select CLANG_UNSUPPORTED if CHROMEOS
 
 if SOC_ROCKCHIP_RK3288