[PATCH] arm64: drop the no-effect select ARM_SMC_MBOX in config ARCH_STM32

[Lukas Bulwahn]

Commit 9e4e24414cc6 ("arm64: introduce STM32 family on Armv8 architecture")
adds the config ARCH_STM32, which selects the non-existing config
ARM_SMC_MBOX. The config ARM_SMC_MBOX was once proposed on the mailing list
(see Link), but it was never merged.

It seems though that this STM32 architecture works fine without this
driver---otherwise, the users and contributor would have already noticed
this by now.

Drop this no-effect select ARM_SMC_MBOX in config ARCH_STM32.

Link: https://lore.kernel.org/lkml/1575281525-1549-1-git-send-email-peng.fan@nxp.com/
Signed-off-by: Lukas Bulwahn <lukas.bulwahn at gmail.com>
---
 arch/arm64/Kconfig.platforms | 1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/arm64/Kconfig.platforms b/arch/arm64/Kconfig.platforms
index 24335565bad5..50ace066d57b 100644
--- a/arch/arm64/Kconfig.platforms
+++ b/arch/arm64/Kconfig.platforms
@@ -302,7 +302,6 @@ config ARCH_STM32
 	select GPIOLIB
 	select PINCTRL
 	select PINCTRL_STM32MP257
-	select ARM_SMC_MBOX
 	select ARM_SCMI_PROTOCOL
 	select COMMON_CLK_SCMI
 	help
-- 
2.17.1