package/dtc: renumber patches correctly

When c7ffd8a7 ("package/dtc: fix
include guards for older kernel/u-boot") introduced a new patch to the
dtc package, it used the 0001 number, which was already used by
another patch. Let's fix that.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>