ppc: Remove many T104x boards

These boards have not been converted to CONFIG_DM_PCI, CONFIG_DM_USB or
in some cases CONFIG_DM itself by the deadline.  Remove them.

Cc: Priyanka Jain <priyanka.jain@nxp.com>
Cc: Ruchika Gupta <ruchika.gupta@nxp.com>
Signed-off-by: Tom Rini <trini@konsulko.com>