net: ipa: fix table alignment requirement

[ Upstream commit e5d4e96b ]

We currently have a build-time check to ensure that the minimum DMA
allocation alignment satisfies the constraint that IPA filter and
route tables must point to rules that are 128-byte aligned.

But what's really important is that the actual allocated DMA memory
has that alignment, even if the minimum is smaller than that.

Remove the BUILD_BUG_ON() call checking against minimim DMA alignment
and instead verify at rutime that the allocated memory is properly
aligned.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Stable-dep-of: cf412ec3 ("net: ipa: properly limit modem routing table use")
Signed-off-by: Sasha Levin <sashal@kernel.org>