After double check with Layerscape CAN owner (Pankaj Bansal), confirm that
LS1021A doesn't support ECC feature, so remove FLEXCAN_QUIRK_DISABLE_MECR
quirk.

Fixes: 99b7668c ("can: flexcan: adding platform specific details for LS1021A")
Cc: Pankaj Bansal <pankaj.bansal@nxp.com>
Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
Link: https://lore.kernel.org/r/20201020155402.30318-4-qiangqing.zhang@nxp.comSigned-off-by: Marc Kleine-Budde <mkl@pengutronix.de>