spl_mmc/CONFIG_SPL_OS_BOOT: Allow environment to determine what to boot

We add two new environment variables, falcon_args_file and
falcon_image_file, which when set will override the compiled in def

spl_mmc/CONFIG_SPL_OS_BOOT: Allow environment to determine what to boot

We add two new environment variables, falcon_args_file and
falcon_image_file, which when set will override the compiled in default
values for falcon mode.

Signed-off-by: Tom Rini <trini@ti.com>

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Merge branch 'master' of git://git.denx.de/u-boot-arm

spl: common: Support for USB MSD FAT image loading

Add SPL support to be able to detect a USB Mass Storage device
connected to a USB host. Once a USB Mass storage device is detected
the SPL will lo

spl: common: Support for USB MSD FAT image loading

Add SPL support to be able to detect a USB Mass Storage device
connected to a USB host. Once a USB Mass storage device is detected
the SPL will load the u-boot.img from a FAT partition to target address.

Signed-off-by: Dan Murphy <dmurphy@ti.com>

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spl: common: Move FAT funcs to a common file

Move the FAT functions to a common location for reuse.

Signed-off-by: Dan Murphy <dmurphy@ti.com>