net/atlantic: fix max EEPROM size
net/atlantic: fix max EEPROM size

Maximum size should be 256 bytes.
Move declaration to the top of the file

Fixes: ce4e8d418097 ("net/atlantic: implement EEPROM get/set")
Cc: stable@dpdk.org

Signed-off-by: Igor Russkikh <84bb31e89044ad5cf75616997932933f48af3f9a@aquantia.com>
Signed-off-by: Pavel Belous <1f23273373de8dde8bed0fed8f0a6f8f35789d50@aquantia.com>

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