setup_sdcard.sh: these checks are not actually used anymore

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>
hwpack: add bbb-blank-eeprom target

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>
setup_sdcard.sh: drop the fat partition down to 16mb on devices with microsdx partitions setups

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>