tests: drivers: can: api: canfd: use 75% for the data phase sample point

Use a sample point of 75% for the data phase timing to match the bitrate of
1Mbit/s.

Fixes: #100615

Signed-off-by: Henrik Brix Andersen <[email protected]>

Author: henrikbrixandersen

tests/drivers/can/api/src/canfd.c

@@ -527,7 +527,7 @@ ZTEST_USER(canfd, test_set_timing_data_while_started)
 	struct can_timing timing = { 0 };
 	int err;
 
-	err = can_calc_timing_data(can_dev, &timing, TEST_BITRATE_3, TEST_SAMPLE_POINT);
+	err = can_calc_timing_data(can_dev, &timing, TEST_BITRATE_3, TEST_SAMPLE_POINT_2);
 	zassert_true(err >= 0, "failed to calculate data timing (err %d)", err);
 	zassert_true(err <= CONFIG_CAN_SAMPLE_POINT_MARGIN, "sample point error %d too large", err);