net: dsa: microchip: ksz8_r_sta_mac_table(): Utilize error values from read/write functions
Take advantage of the return values provided by read/write functions in ksz8_r_sta_mac_table() to handle cases where read/write operations may fail. Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> Acked-by: Arun Ramadoss <arun.ramadoss@microchip.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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