staging: mt7621-dts: remove 'bug-range' property

Property 'bus-range' when values are the default are
not necessary to be defined. Hence, remove all of them.

Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20210506170742.28196-2-sergio.paracuellos@gmail.com


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