ARM: mx6: Enable MMC and SATA extfs boot support

Enable support for booting U-Boot image from ext filesystem when either
SD/MMC or SATA support is compiled into the SPL. This will allow easy
transition from loading U-Boot image from ad-hoc offset on the card to
loading U-Boot image from the filesystem. VFAT support is intently not
enabled. The boot order is tweaked so that raw is tested first and if
the raw has no signature, FS boot is attempted.

To install just the SPL on i.MX6 board, perform the following operation
 $ dd if=SPL of=/dev/sdX seek=2 bs=512
To install the U-Boot image, copy u-boot.img to the first partition of
the SD/MMC/SATA drive. The partition must be formated to extfs.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Peng Fan <van.freenix@gmail.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Tom Rini <trini@konsulko.com>

include/configs/imx6_spl.h

@@ -48,12 +48,16 @@
 #define CONFIG_SYS_U_BOOT_MAX_SIZE_SECTORS	800 /* 400 KB */
 #define CONFIG_SYS_MMCSD_FS_BOOT_PARTITION	1
 #define CONFIG_SYS_MONITOR_LEN  (CONFIG_SYS_U_BOOT_MAX_SIZE_SECTORS/2*1024)
+#define CONFIG_SPL_ABORT_ON_RAW_IMAGE
+#define CONFIG_SPL_EXT_SUPPORT
 #endif
 
 /* SATA support */
 #if defined(CONFIG_SPL_SATA_SUPPORT)
 #define CONFIG_SPL_SATA_BOOT_DEVICE		0
 #define CONFIG_SYS_SATA_FAT_BOOT_PARTITION	1
+#define CONFIG_SPL_ABORT_ON_RAW_IMAGE
+#define CONFIG_SPL_EXT_SUPPORT
 #endif
 
 /* Define the payload for FAT/EXT support */

include/configs/novena.h

@@ -75,7 +75,6 @@
 
 /* SPL */
 #define CONFIG_SPL_FAT_SUPPORT
-#define CONFIG_SPL_EXT_SUPPORT
 #define CONFIG_SPL_MMC_SUPPORT
 #include "imx6_spl.h"			/* common IMX6 SPL configuration */
 

include/configs/tqma6.h

@@ -16,7 +16,6 @@
 #define CONFIG_SPL_MMC_SUPPORT
 #define CONFIG_SPL_SPI_SUPPORT
 #define CONFIG_SPL_FAT_SUPPORT
-#define CONFIG_SPL_EXT_SUPPORT
 
 /* common IMX6 SPL configuration */
 #include "imx6_spl.h"