can: m_can: fix not set can_dlc for remote frame
can: m_can: fix not set can_dlc for remote frame

The original code missed to set the cf->can_dlc in the RTR case, so add it.

Signed-off-by: Dong Aisheng <f8b72116bf80189a70941b53a10a3d3b2650c711@freescale.com>
Signed-off-by: Marc Kleine-Budde <4a0ea1158d3cc63151119c05b1bff00c0bdbf421@pengutronix.de>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs