devlink: Fix referring to hw_addr attribute during state validation

[ Upstream commit 1a89e24f ]

When port function state change is requested, and when the driver
does not support it, it refers to the hw address attribute instead
of state attribute. Seems like a copy paste error.

Fix it by referring to the port function state attribute.

Fixes: c0bea69d

 ("devlink: Validate port function request")
Signed-off-by: Parav Pandit <parav@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/20240129191059.129030-1-parav@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>