sunxi: update SATA driver to always use DM_SCSI

It seems like the Allwinner SATA driver is already quite capable of
using the driver model, so we can force this on all boards and can
remove support for a non-DM_SCSI build.
This removes the warning about boards with SATA ports not being
DM_SCSI compliant.

It also takes the opportunity to move the driver out of the board/sunxi
directory to join its siblings in drivers/ata, and to make it a proper
Kconfig citizen.

The board defconfigs stay untouched.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Jagan Teki <jagan@openedev.com>
[jagan: select DM_SCSI separately]
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
diff --git a/board/sunxi/Makefile b/board/sunxi/Makefile
index 4d6258d..c4e13f8 100644
--- a/board/sunxi/Makefile
+++ b/board/sunxi/Makefile
@@ -8,9 +8,6 @@
 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 obj-y	+= board.o
 obj-$(CONFIG_SUN7I_GMAC)	+= gmac.o
-ifndef CONFIG_SPL_BUILD
-obj-$(CONFIG_SUNXI_AHCI)	+= ahci.o
-endif
 obj-$(CONFIG_MACH_SUN4I)	+= dram_sun4i_auto.o
 obj-$(CONFIG_MACH_SUN5I)	+= dram_sun5i_auto.o
 obj-$(CONFIG_MACH_SUN7I)	+= dram_sun5i_auto.o
diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index 7ebee75..4be5c63 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -101,6 +101,14 @@
 	help
 	  Enable this driver to support the SIL3114 SATA controllers.
 
+config SUNXI_AHCI
+	bool "Enable Allwinner SATA driver support"
+	depends on AHCI
+	default y if ARCH_SUNXI
+	help
+	  Enable this driver to support the SATA controllers found in the
+	  Allwinner A10, A20 and R40 SoCs.
+
 config AHCI_MVEBU
 	bool "Marvell EBU AHCI SATA support"
 	depends on ARCH_MVEBU
diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile
index 10bed53..a69edb1 100644
--- a/drivers/ata/Makefile
+++ b/drivers/ata/Makefile
@@ -18,3 +18,4 @@
 obj-$(CONFIG_SATA_SIL) += sata_sil.o
 obj-$(CONFIG_SANDBOX) += sata_sandbox.o
 obj-$(CONFIG_AHCI_MVEBU) += ahci_mvebu.o
+obj-$(CONFIG_SUNXI_AHCI) += ahci_sunxi.o
diff --git a/board/sunxi/ahci.c b/drivers/ata/ahci_sunxi.c
similarity index 93%
rename from board/sunxi/ahci.c
rename to drivers/ata/ahci_sunxi.c
index 9b03013..77b932a 100644
--- a/board/sunxi/ahci.c
+++ b/drivers/ata/ahci_sunxi.c
@@ -70,15 +70,6 @@
 	return 0;
 }
 
-#ifndef CONFIG_DM_SCSI
-void scsi_init(void)
-{
-	if (sunxi_ahci_phy_init((u8 *)SUNXI_SATA_BASE) < 0)
-		return;
-
-	ahci_init((void __iomem *)SUNXI_SATA_BASE);
-}
-#else
 static int sunxi_sata_probe(struct udevice *dev)
 {
 	ulong base;
@@ -132,4 +123,3 @@
 	.bind		= sunxi_sata_bind,
 	.probe		= sunxi_sata_probe,
 };
-#endif
diff --git a/include/configs/sunxi-common.h b/include/configs/sunxi-common.h
index b01d1c3..bc30994 100644
--- a/include/configs/sunxi-common.h
+++ b/include/configs/sunxi-common.h
@@ -104,13 +104,7 @@
 #define PHYS_SDRAM_0_SIZE		0x80000000 /* 2 GiB */
 
 #ifdef CONFIG_AHCI
-#define CONFIG_SCSI_AHCI_PLAT
-#define CONFIG_SUNXI_AHCI
 #define CONFIG_SYS_64BIT_LBA
-#define CONFIG_SYS_SCSI_MAX_SCSI_ID	1
-#define CONFIG_SYS_SCSI_MAX_LUN		1
-#define CONFIG_SYS_SCSI_MAX_DEVICE	(CONFIG_SYS_SCSI_MAX_SCSI_ID * \
-					 CONFIG_SYS_SCSI_MAX_LUN)
 #endif
 
 #define CONFIG_SETUP_MEMORY_TAGS
diff --git a/scripts/config_whitelist.txt b/scripts/config_whitelist.txt
index fa98efc..d422190 100644
--- a/scripts/config_whitelist.txt
+++ b/scripts/config_whitelist.txt
@@ -1939,7 +1939,6 @@
 CONFIG_STV0991_HZ
 CONFIG_STV0991_HZ_CLOCK
 CONFIG_ST_SMI
-CONFIG_SUNXI_AHCI
 CONFIG_SUNXI_GPIO
 CONFIG_SUNXI_MAX_FB_SIZE
 CONFIG_SUPERH_ON_CHIP_R8A66597