include/configs: remove default values of CONFIG_SYS_BARGSIZE

CONFIG_SYS_BARGSIZE is already defined to 512 in common/image.c when
not defined. Therefore, there is no point in having board
configuration files define it to 512.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
22 files changed