Fix Kconfig style

Remove spaces from Kconfig
Add comments

arch/arm/src/at32/Kconfig

@@ -1086,7 +1086,7 @@ config AT32_JTAG_NOJNTRST_ENABLE
 config AT32_JTAG_SW_ENABLE
 	bool "Set JTAG-DP disabled and SW-DP enabled"
 
-endchoice
+endchoice # JTAG Configuration
 
 config AT32_DISABLE_IDLE_SLEEP_DURING_DEBUG
 	bool "Disable IDLE Sleep (WFI) in debug mode"

arch/arm64/Kconfig

@@ -20,7 +20,7 @@ config ARM64_TOOLCHAIN_CLANG
 	bool "LLVM Clang toolchain"
 	select ARCH_TOOLCHAIN_CLANG
 
-endchoice
+endchoice # ARM64 Toolchain Selection
 
 choice
 	prompt "ARM64 chip selection"
@@ -94,7 +94,7 @@ config ARCH_CHIP_ARM64_CUSTOM
 	---help---
 		Select this option if there is no directory for the chip under arch/arm64/src/.
 
-endchoice
+endchoice # ARM64 chip selection
 
 config ARCH_ARMV8A
 	bool
@@ -278,7 +278,7 @@ config ARM64_SEMIHOSTING_HOSTFS_CACHE_COHERENCE
 	---help---
 		Flush & Invalidte cache before & after bkpt instruction.
 
-endif
+endif # ARM64_SEMIHOSTING_HOSTFS
 
 config ARM64_DCACHE_DISABLE
 	bool "Disable DCACHE at __start"

boards/arm/stm32/nucleo-f429zi/Kconfig

@@ -26,7 +26,7 @@ choice
 		other functions on PC6, PC7
 
 				STM32F4
-			ARDUIONO FUNCTION  GPIO
+			ARDUINO  FUNCTION  GPIO
 			-- ----- --------- ----
 			DO RX    USART6_RX PG9
 			D1 TX    USART6_TX PG14

boards/arm/stm32f7/nucleo-144/Kconfig

@@ -48,7 +48,7 @@ choice
 		other functions on PC6, PC7
 
 				STM32F7
-			ARDUIONO FUNCTION  GPIO
+			ARDUINO  FUNCTION  GPIO
 			-- ----- --------- ----
 			DO RX    USART6_RX PG9
 			D1 TX    USART6_TX PG14