IB/cache: Add log messages for IB device state changes

IB/cache: Add log messages for IB device state changes

Enhance visibility into IB device state transitions by adding log messages
to the kernel log (dmesg). Whenever an IB device changes state, a relevant
print will be printed, such as:

"mlx5_core 0000:08:00.0 mlx5_0: Port: 1 Link DOWN"
"mlx5_core 0000:08:00.0 rdmap8s0f0: Port: 2 Link ACTIVE"

Signed-off-by: Maher Sanalla <msanalla@nvidia.com>
Link: https://patch.msgid.link/2d26ccbd669bad99089fa2aebb5cba4014fc4999.1738586601.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>