discover: Add petitboot,tty and track available consoles
authorSamuel Mendoza-Jonas <sam@mendozajonas.com>
Wed, 8 Jun 2016 03:51:28 +0000 (13:51 +1000)
committerSamuel Mendoza-Jonas <sam@mendozajonas.com>
Wed, 29 Jun 2016 04:19:08 +0000 (14:19 +1000)
Add the NVRAM parameter petitboot,tty which sets the default console to
use when booting a kernel.
In load_config() construct a list of available consoles depending on the
current platform. A future patch depending on firmware changes will
allow this list to be constructed dynamically.

Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>

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