memory: Simplify 'default' choice in Kconfig

'default y if FOO' can be written shorter (and it already is in other
places).

Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Krzysztof Kozlowski <[e-mail]>

drivers/memory/Kconfig

···
 
 config ATMEL_EBI
 	bool "Atmel EBI driver"
-	default y if ARCH_AT91
+	default ARCH_AT91
 	depends on ARCH_AT91 || COMPILE_TEST
 	depends on OF
 	select MFD_SYSCON
···
 
 config MVEBU_DEVBUS
 	bool "Marvell EBU Device Bus Controller"
-	default y if PLAT_ORION
+	default PLAT_ORION
 	depends on PLAT_ORION || COMPILE_TEST
 	depends on OF
 	help
···
 
 config PL353_SMC
 	tristate "ARM PL35X Static Memory Controller(SMC) driver"
-	default y if ARM
+	default ARM
 	depends on ARM || COMPILE_TEST
 	depends on ARM_AMBA
 	help