Revert "staging: fsl-mc: decouple the mc-bus public headers from dprc.h"

This reverts commit c6ce019e

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The whole series is broken, so back it all out.

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Cc: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>