can: kvaser_usb: kvaser_usb_set_bittiming(): fix redundant initialization warning for err

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2071839
Tested: This is one of a series of patch sets to enable Arm SystemReady IR
 support.  This set updates the CAN driver subsystem.  This set has
 been tested on NXP imx8mm and NV Jetson Xavier NX via simple boot
 tests, using cansend/candump from can-utils to pass messages through
 a virtual CAN interface, and of course the CI loop.

commit cce2d7d
Author: Marc Kleine-Budde <mkl@pengutronix.de>
Date:   Mon Oct 31 12:26:24 2022 +0100

    can: kvaser_usb: kvaser_usb_set_bittiming(): fix redundant initialization warning for err

    The variable err is initialized, but the initialized value is
    Overwritten before it is read. Fix the warning by not initializing the
    variable err at all.

    Fixes: 39d3df6 ("can: kvaser_usb: Compare requested bittiming parameters with actual parameters in do_set_{,data}_bittiming")
    Cc: Jimmy Assarsson <extja@kvaser.com>
    Cc: Anssi Hannula <anssi.hannula@bitwise.fi>
    Link: https://lore.kernel.org/all/20221031114513.81214-1-mkl@pengutronix.de
    Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
    (cherry picked from commit cce2d7d)

Signed-off-by: Al Stone <ahs3@redhat.com>

Author: Al Stone

drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c

@@ -540,7 +540,7 @@ static int kvaser_usb_set_bittiming(struct net_device *netdev)
 	int tseg1 = bt->prop_seg + bt->phase_seg1;
 	int tseg2 = bt->phase_seg2;
 	int sjw = bt->sjw;
-	int err = -EOPNOTSUPP;
+	int err;
 
 	busparams.bitrate = cpu_to_le32(bt->bitrate);
 	busparams.sjw = (u8)sjw;