configs: bcm968580 disable CONFIG_CMD_BOOTEFI_SELFTEST
Configuration option CONFIG_CMD_BOOTEFI_SELFTEST is useful for the
development of the UEFI sub-system. For production it is not needed.
Remove CONFIG_CMD_BOOTEFI_SELFTEST from bcm968580xref_ram_defconfig.
Suggested-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>