Introduce msg_*warn

Also, unify all outputs of "Warning:" and "Error:" to use normal
capitalization instead of mixing it with all capitals.

Corresponding to flashrom svn r1643.

Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
Acked-by: Idwer Vollering <vidwer@gmail.com>
11 files changed