media: imx8mq-mipi-csi2: Switch to RUNTIME/SYSTEM_SLEEP_PM_OPS()

media: imx8mq-mipi-csi2: Switch to RUNTIME/SYSTEM_SLEEP_PM_OPS()

Replace SET_RUNTIME_PM_OPS()/SET SYSTEM_SLEEP_PM_OPS() with their modern
RUNTIME_PM_OPS() and SYSTEM_SLEEP_PM_OPS() alternatives.

The combined usage of pm_ptr() and RUNTIME_PM_OPS/SYSTEM_SLEEP_PM_OPS()
allows the compiler to evaluate if the runtime suspend/resume() functions
are used at build time or are simply dead code.

This allows removing the __maybe_unused notation from the runtime
suspend/resume() functions..

Signed-off-by: Fabio Estevam <festevam@denx.de>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://lore.kernel.org/r/20240807182610.81244-2-festevam@gmail.com
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>