pch_can: fix 800k comms issue

Currently, 800k comms fails since prop_seg set zero.
(EG20T PCH CAN register of prop_seg must be set more than 1)
To prevent prop_seg set to zero, change tseg2_min 1 to 2.
Signed-off-by: NTomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/can/pch_can.c

@@ -187,7 +187,7 @@ static struct can_bittiming_const pch_can_bittiming_const = {
 	.name = KBUILD_MODNAME,
 	.tseg1_min = 1,
 	.tseg1_max = 16,
-	.tseg2_min = 1,
+	.tseg2_min = 2,
 	.tseg2_max = 8,
 	.sjw_max = 4,
 	.brp_min = 1,