net/axgbe: fix EEPROM string comparison

net/axgbe: fix EEPROM string comparison

drivers/net/axgbe/axgbe_phy_impl.c:576:6: error:
‘__builtin_memcmp_eq’ reading 16 bytes from a region of size 9
[-Werror=stringop-overflow=]
  if (memcmp(&sfp_eeprom->base[AXGBE_SFP_BASE_VENDOR_NAME],
      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      AXGBE_BEL_FUSE_VENDOR, AXGBE_SFP_BASE_VENDOR_NAME_LEN))

Fixes: a5c7273771e8 ("net/axgbe: add phy programming APIs")

Signed-off-by: Andy Green <andy@warmcat.com>
Acked-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>