bus: fsl-mc: simplify DPRC version check

Because the minimum supported DPRC version is 6.0, there is no need to
check for incompatible 6.x versions lower to the minimum one.  Just
remove the second half of the check to simplify the logic.

Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Link: https://lore.kernel.org/r/20201123164839.1668409-1-ciorneiioana@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>