can: mcp251x: allow to read two registers in one spi transfer
This patch bases on work done earlier by David Jander. Signed-off-by: NSascha Hauer <s.hauer@pengutronix.de> Acked-by: NDavid Jander <david@protonic.nl> Signed-off-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: NMarc Kleine-Budde <mkl@pengutronix.de> Acked-by: NWolfgang Grandegger <wg@grandegger.com>
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