RDMA/core: Remove the kobject_uevent() NOP

This call does nothing because the ib_port kobj is nested under a struct
device kobject and the dev_uevent_filter() function of the struct device
blocks uevents for any children kobj's that are not also struct devices.

A uevent for the struct device will be triggered after
ib_setup_port_attrs() returns which causes udev to pick up all the deep
"attributes" which are implemented as kobjects nested under a struct
device and assign them to the udev object for the struct device:

 $ udevadm info -a /sys/class/infiniband/ibp0s9
     ATTR{ports/1/counters/excessive_buffer_overrun_errors}=="0"

Link: https://lore.kernel.org/r/49231c92c7d4c60686de18f7e20932d0c82160ee.1623427137.git.leonro@nvidia.comSigned-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/core/sysfs.c

@@ -1422,8 +1422,6 @@ int ib_setup_port_attrs(struct ib_core_device *coredev)
 			if (ret)
 				goto err_put;
 		}
-
-		kobject_uevent(&port->kobj, KOBJ_ADD);
 	}
 	return 0;