Merge branch 'ipa-32bit'

Alex Elder says:

====================
net: ipa: support 32-bit targets

There is currently a configuration dependency that restricts IPA to
be supported only on 64-bit machines.  There are only a few things
that really require that, and those are fixed in this series.  The
last patch in the series removes the CONFIG_64BIT build dependency
for IPA.

Version 2 of this series uses upper_32_bits() rather than creating
a new function to extract bits out of a DMA address.  Version 3 of
uses lower_32_bits() as well.
====================

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