Bug#1056003: flashrom: register_spi_master called with incomplete master definition

[Bastian Germann]

Control: forwarded -1 
https://github.com/flashrom/flashrom/commit/e1f30bbce7a603d518ecec9d7e6885719f396719

Upstream has fixed this in the current development version shortly after 1.3.0 
was released.
Please backport the fix to the Debian package.