Deduplicate rWTM command execution calls
  mbox_send_message()
  wait_for_completion()
  mox_get_status()
to one function
  mox_rwtm_exec()
Signed-off-by: Marek Behún <kabel@kernel.org>
Reviewed-by: Andy Shevchenko <andy@kernel.org>
Link: https://lore.kernel.org/r/20240831092050.23093-17-kabel@kernel.orgSigned-off-by: Arnd Bergmann <arnd@arndb.de>