linux-phytec-ti

mmc: sdhci-of: fix build on non-powerpc platforms

Explicitly include err.h, of_address.h and of_irq.h.
Make use of machine_is() conditional on PPC.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>