powerpc: P1010RDB: Disable legacy PCIe driver when DM_PCI is enabled

Disable legacy PCIe driver and unused PCIe macros when DM_PCI enabled
for P1010RDB board.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>