staging: fsl-mc: Name MC object devices using decimal numbers

MC object devices were being named using hexadecimaal numbers.
This was not consistent with the object naming conventions used
by MC DPLs and the MC restool.

Signed-off-by: J. German Rivera <German.Rivera@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>