console: rename do_vtxprintf to do_printk_va_list and use it

The name is more consistent with what we have elsewhere,
and the callsite didn't build at all (with vboot enabled)

Change-Id: I3576f3b8f737d360f68b67b6ce1683199948776d
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-on: http://review.coreboot.org/10096
Tested-by: build bot (Jenkins)
3 files changed