configs: imx8mm_venice_defconfig: remove unused SPL features

remove unused SPL features to shink the size of the SPL which
otherwise would no longer fit into IMX8M Mini OCRAM.
Signed-off-by: NTim Harvey <tharvey@gateworks.com>

configs/imx8mm_venice_defconfig

@@ -26,7 +26,6 @@ CONFIG_DISTRO_DEFAULTS=y
 CONFIG_FIT=y
 CONFIG_FIT_EXTERNAL_OFFSET=0x3000
 CONFIG_SPL_LOAD_FIT=y
-CONFIG_SPL_LOAD_FIT_FULL=y
 CONFIG_SPL_FIT_GENERATOR="arch/arm/mach-imx/mkimage_fit_atf.sh"
 CONFIG_OF_SYSTEM_SETUP=y
 CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=arch/arm/mach-imx/imx8m/imximage-8mm-lpddr4.cfg"