console: Squelch pre-console output in console functions

There are some locations in the code which anticipate printf() being called
before the console is ready by squelching printf() on gd->have_console.
Move this squelching into printf(), vprintf(), puts() and putc(). Also
make tstc() and getc() return 0 if console is not yet initialised

Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
Change-Id: If62863017eaa48915b721675a5d520f9caa7e5e0
Reviewed-on: http://gerrit.chromium.org/gerrit/8685
Reviewed-by: Che-Liang Chiou <clchiou@chromium.org>
Tested-by: Simon Glass <sjg@chromium.org>

0 files changed, 0 insertions, 0 deletions