lan743x: remove redundant assignment to variable rx_process_result

The variable rx_process_result is being initialized with a value that
is never read and is being re-assigned immediately afterwards. The
assignment is redundant, so replace it with the return from function
lan743x_rx_process_packet.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/ethernet/microchip/lan743x_main.c

···
 	}
 	count = 0;
 	while (count < weight) {
-		int rx_process_result = -1;
+		int rx_process_result = lan743x_rx_process_packet(rx);
 
-		rx_process_result = lan743x_rx_process_packet(rx);
 		if (rx_process_result == RX_PROCESS_RESULT_PACKET_RECEIVED) {
 			count++;
 		} else if (rx_process_result ==