auxbus: make to_auxiliary_drv accept and return a constant pointer

In the quest to make struct device constant, start by making
to_auxiliary_drv() return a constant pointer so that drivers that call
this can be fixed up before the driver core changes.

As the return type previously was not constant, also fix up all callers
that were assuming that the pointer was not going to be a constant one
in order to not break the build.

Cc: Dave Ertman <[email protected]>
Cc: Ira Weiny <[email protected]>
Cc: Rafael J. Wysocki <[email protected]>
Cc: Bingbu Cao <[email protected]>
Cc: Tianshu Qiu <[email protected]>
Cc: Mauro Carvalho Chehab <[email protected]>
Cc: Michael Chan <[email protected]>
Cc: David S. Miller <[email protected]>
Cc: Eric Dumazet <[email protected]>
Cc: Jakub Kicinski <[email protected]>
Cc: Paolo Abeni <[email protected]>
Cc: Jesse Brandeburg <[email protected]>
Cc: Tony Nguyen <[email protected]>
Cc: Saeed Mahameed <[email protected]>
Cc: Leon Romanovsky <[email protected]>
Cc: Tariq Toukan <[email protected]>
Cc: Pierre-Louis Bossart <[email protected]>
Cc: Liam Girdwood <[email protected]>
Cc: Peter Ujfalusi <[email protected]>
Cc: Bard Liao <[email protected]>
Cc: Ranjani Sridharan <[email protected]>
Cc: Daniel Baluta <[email protected]>
Cc: Kai Vehmanen <[email protected]>
Cc: Jaroslav Kysela <[email protected]>
Cc: Takashi Iwai <[email protected]>
Cc: Richard Cochran <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Acked-by: Sakari Ailus <[email protected]> # drivers/media/pci/intel/ipu6
Acked-by: Mark Brown <[email protected]>
Reviewed-by: Martin Habets <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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