sunxi: make NAND_SUNXI use ARCH_SUNXI as default in Kconfig

Remove NAND_SUNXI from the CHIP pro defconfig to be automatically
selected depending on the state of ARCH_SUNXI.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
index 75eefc8..cf323c5 100644
--- a/drivers/mtd/nand/Kconfig
+++ b/drivers/mtd/nand/Kconfig
@@ -95,6 +95,7 @@
 
 config NAND_SUNXI
 	bool "Support for NAND on Allwinner SoCs"
+	default ARCH_SUNXI
 	depends on MACH_SUN4I || MACH_SUN5I || MACH_SUN7I || MACH_SUN8I
 	select SYS_NAND_SELF_INIT
 	select SYS_NAND_U_BOOT_LOCATIONS