sunxi: allow NAND support to be compiled for sun8i platforms

Add some clocks/PLL definitions as well as the dependency on MACH_SUN8I
in Kconfig.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
index a820af6..dcb8ff6 100644
--- a/drivers/mtd/nand/Kconfig
+++ b/drivers/mtd/nand/Kconfig
@@ -95,7 +95,7 @@
 
 config NAND_SUNXI
 	bool "Support for NAND on Allwinner SoCs"
-	depends on MACH_SUN4I || MACH_SUN5I || MACH_SUN7I
+	depends on MACH_SUN4I || MACH_SUN5I || MACH_SUN7I || MACH_SUN8I
 	select SYS_NAND_SELF_INIT
 	select SYS_NAND_U_BOOT_LOCATIONS
 	imply CMD_NAND