platform/surface: aggregator: Omit a variable reassignment in ssam_serial_hub_probe()

platform/surface: aggregator: Omit a variable reassignment in ssam_serial_hub_probe()

An error code was assigned to a variable and checked accordingly.
This value was passed to a dev_err_probe() call in an if branch.
This function is documented in the way that the same value is returned.
Thus delete a redundant variable reassignment.

The source code was transformed by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Link: https://patch.msgid.link/b25c9842-7ebc-43f0-a411-8098359f81a6@web.de
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>