QEMU 3.0 introduced additional memory-mapped regions for PCI-E ECAM and
MMIO. Thus we need to add them to our MMU map or U-Boot will crash with
a Synchronous Abort during PCI-E probing when it tries to access the
unmapped ECAM memory area.

Reported-by: Jonathan Gray <jsg@jsg.id.au>
Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>
Tested-by: Jonathan Gray <jsg@jsg.id.au>