linux-wandboard

Update ibm_newemac to use dcr_host_t.base

Now that dcr_host_t contains the base address, we can use that in the
ibm_newemac code, rather than storing it separately.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Jeff Garzik <jeff@garzik.org>