uboot-imx

include/mmc.h: Remove declaration for spl_mmc_load()

The spl_mmc_load() was removed while converting to
CONFIG_SPL_FRAMEWORK usage the definition was removed
but the declaration was missed. This patch removes this
declaration.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Acked-by: Pantelis Antoniou <panto@antoniou-consulting.com>