setup_sdcard.sh: flasher

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>
setup_sdcard.sh: console=tty0

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>
rcn: v3.14.5-armv7-x8 & v3.8.13-bone56

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