net/sfc/base: add firmware ID header
net/sfc/base: add firmware ID header

Add definitions header for reflash header IDs. This is required to
support different handling modes for signed firmware images.

Signed-off-by: Richard Houldsworth <4c2eaee98940daebe5f63a71cc5b0fe64b0370c4@solarflare.com>
Signed-off-by: Andrew Rybchenko <ac94ab2a8fe9a9a087f6e24dcbc16626b52c07e8@solarflare.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk