can: c_can: Avoid status register update for D_CAN
On D_CAN the RXOK, TXOK and LEC bits are cleared/set on read of the status register. No need to update them. Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Tested-by: NAlexander Stein <alexander.stein@systec-electronic.com> Signed-off-by: NMarc Kleine-Budde <mkl@pengutronix.de>
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