Fix two level 4 warnings
"C4057: 'function': 'const uint8_t *' differs in indirection to
slightly different base types from 'caddr_t'"; no functional changes.
Fixes: 354df7eadf66 ("net/sfc/base: import bootrom configuration")
Cc: stable@dpdk.org
Signed-off-by: Andrew Lee <alee@solarflare.com>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>