Merge branch 'net-ipa-I-O-map-SMEM-and-IMEM'

Alex Elder says:

====================
net: ipa: I/O map SMEM and IMEM

This series adds the definition of two memory regions that must be
mapped for IPA to access through an SMMU.  It requires the SMMU to
be defined in the IPA node in the SoC's Device Tree file.

There is no change since version 1 to the content of the code in
these patches, *however* this time the first patch is an update to
the binding definition rather than an update to a DTS file.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>