sfc: remove unused 'enum efx_rx_alloc_method'
sfc: remove unused 'enum efx_rx_alloc_method'

Signed-off-by: Ben Hutchings <0672176982fbc629cc374f31a7a45ae1671abf90@solarflare.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs