net: xilinx: axienet: Don't print if we go into promiscuous mode

A message about being in promiscuous mode is printed every time each
additional multicast address beyond four is added. Suppress this message
like is done in other drivers.

Signed-off-by: Sean Anderson <sean.anderson@linux.dev>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20240822154059.1066595-4-sean.anderson@linux.dev


Signed-off-by: Jakub Kicinski <kuba@kernel.org>