sunxi_nand_spl: Use SYS_NAND_SELF_INIT and only do nand init when necessary

Use SYS_NAND_SELF_INIT and only setup the pinmux and clocks when we are
actually using the nand.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
index b6dfb0e..28597f0 100644
--- a/drivers/mtd/nand/Kconfig
+++ b/drivers/mtd/nand/Kconfig
@@ -95,6 +95,7 @@
 config SPL_NAND_SUNXI
 	bool "Support for NAND on Allwinner A20 in SPL"
 	depends on MACH_SUN7I
+	select SYS_NAND_SELF_INIT
 	---help---
 	Enable support for NAND. This option allows SPL to read from
 	sunxi NAND using DMA transfers.
diff --git a/drivers/mtd/nand/sunxi_nand_spl.c b/drivers/mtd/nand/sunxi_nand_spl.c
index f6f4928..9efe904 100644
--- a/drivers/mtd/nand/sunxi_nand_spl.c
+++ b/drivers/mtd/nand/sunxi_nand_spl.c
@@ -153,6 +153,8 @@
 {
 	uint32_t val;
 
+	board_nand_init();
+
 	val = readl(SUNXI_NFC_BASE + NFC_CTL);
 	/* enable and reset CTL */
 	writel(val | NFC_CTL_EN | NFC_CTL_RESET,