can: mcp251xfd: mcp251xfd_open(): make use of pm_runtime_resume_and_get()

can: mcp251xfd: mcp251xfd_open(): make use of pm_runtime_resume_and_get()

With patch

| c4a28fe77ffc PM: runtime: Add pm_runtime_resume_and_get to deal with usage counter

the usual pm_runtime_get_sync() and pm_runtime_put_noidle()
in-case-of-error dance is no longer needed. Convert the mcp251xfd
driver to use this function.

Link: https://lore.kernel.org/all/20220105154300.1258636-6-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>