sunxi: A64: enable SPL

Now that the SPL is ready to be compiled in AArch64 and the DRAM
init code is ready, enable SPL support for the A64 SoC and in the
Pine64 defconfig.
For now we keep the boot0 header in the U-Boot proper, as this allows
to still use boot0 as an SPL replacement without hurting the SPL use
case.
We disable FEL support for now by making its compilation conditional
and disabling it for ARM64, as the code isn't ready yet.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Jagan Teki <jagan@openedev.com>

arch/arm/mach-sunxi/board.c

@@ -133,7 +133,7 @@ static int gpio_init(void)
 	return 0;
 }
 
-#ifdef CONFIG_SPL_BUILD
+#if defined(CONFIG_SPL_BOARD_LOAD_IMAGE) && defined(CONFIG_SPL_BUILD)
 static int spl_board_load_image(struct spl_image_info *spl_image,
 				struct spl_boot_device *bootdev)
 {

board/sunxi/Kconfig

@@ -125,6 +125,7 @@ config MACH_SUN50I
 	bool "sun50i (Allwinner A64)"
 	select ARM64
 	select SUNXI_GEN_SUN6I
+	select SUPPORT_SPL
 
 endchoice
 
@@ -196,6 +197,7 @@ config DRAM_ODT_EN
 	bool "sunxi dram odt enable"
 	default n if !MACH_SUN8I_A23
 	default y if MACH_SUN8I_A23
+	default y if MACH_SUN50I
 	---help---
 	Select this to enable dram odt (on die termination).
 

configs/pine64_plus_defconfig

@@ -5,6 +5,7 @@ CONFIG_MACH_SUN50I=y
 CONFIG_DEFAULT_DEVICE_TREE="sun50i-a64-pine64-plus"
 # CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
 CONFIG_CONSOLE_MUX=y
+CONFIG_SPL=y
 # CONFIG_CMD_IMLS is not set
 # CONFIG_CMD_FLASH is not set
 # CONFIG_CMD_FPGA is not set

include/configs/sunxi-common.h

@@ -183,7 +183,9 @@
 
 #define CONFIG_SPL_FRAMEWORK
 
+#ifndef CONFIG_ARM64		/* AArch64 FEL support is not ready yet */
 #define CONFIG_SPL_BOARD_LOAD_IMAGE
+#endif
 
 #if defined(CONFIG_MACH_SUN9I)
 #define CONFIG_SPL_TEXT_BASE		0x10040		/* sram start+header */