Make ppc-uic a subclass of ppc4xx-dcr-device which will handle the cpu
link and make it uniform with the other PPC4xx devices.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <eb548130cf60aea8a6ea4dba4dee1686b3cabc3d.1660746880.git.balaton@eik.bme.hu>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>