kconfig: Replace defconfig singe-symbol 'if's with 'depends on'

Same deal as in commit eddd98f ("kconfig: Replace some single-symbol
'if's with 'depends on'"), for all symbols defined within defconfig
files. See that commit for an explanation.

Maybe 'if's were used originally to mirror the 'if's in the main Kconfig
files, and then it got copied around by people assuming 'if' must work
differently from 'depends on'. It doesn't match in every spot at least.
Better to keep it simple and just consistently use 'depends on' when
it's a single symbol/choice I think. Helps reinforce that 'if' isn't
magic too.

Verified by printing all Kconfig menu nodes (symbols, choices, menus,
etc.) before and after the change and diffing (should show no
difference).

Signed-off-by: Ulf Magnusson <Ulf.Magnusson@nordicsemi.no>

boards/arc/em_starterkit/Kconfig.defconfig

@@ -48,19 +48,13 @@ endif # I2C_DW
 
 endif # I2C
 
-if SERIAL
-
 config UART_NS16550
 	default y
-
-endif # SERIAL
-
-if UART_CONSOLE
+	depends on SERIAL
 
 config UART_NS16550_PORT_1
 	default y
-
-endif # UART_CONSOLE
+	depends on UART_CONSOLE
 
 if SPI
 

boards/arc/emsdp/Kconfig.defconfig

@@ -26,18 +26,12 @@ endif # GPIO_DW
 
 endif # GPIO
 
-if SERIAL
-
 config UART_NS16550
 	default y
-
-endif # SERIAL
-
-if UART_CONSOLE
+	depends on SERIAL
 
 config UART_NS16550_PORT_0
 	default y
-
-endif # UART_CONSOLE
+	depends on UART_CONSOLE
 
 endif # BOARD_EMSDP

boards/arc/hsdk/Kconfig.defconfig

@@ -11,12 +11,9 @@ if GPIO
 config GPIO_DW
 	default y
 
-if GPIO_DW
-
 config GPIO_DW_0
 	default y
-
-endif # GPIO_DW
+	depends on GPIO_DW
 
 endif # GPIO
 

boards/arc/iotdk/Kconfig.defconfig

@@ -1,8 +1,5 @@
 # SPDX-License-Identifier: Apache-2.0
 
-if BOARD_IOTDK
-
 config BOARD
 	default "iotdk"
-
-endif # BOARD_IOTDK
+	depends on BOARD_IOTDK

boards/arc/nsim/Kconfig.defconfig

@@ -5,12 +5,8 @@ if BOARD_NSIM
 config BOARD
 	default "nsim"
 
-if SERIAL
-
 config UART_NSIM
 	default y
-
-endif # SERIAL
-
+	depends on SERIAL
 
 endif # BOARD_NSIM