Buffalo uses the TRX header with a different magic and even changes this
magic with different devices. This change allows to specify the header
to use as a command line argument.
This is needed for the Buffalo WSR-2533DHP2 based on mt7622.
Co-Developed-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: INAGAKI Hiroshi <musashino.open@gmail.com>
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>