net: ipa: always validate filter and route tables

All checks in ipa_table_validate_build() are computed at build time,
so build that unconditionally.

In ipa_table_valid() calls to ipa_table_valid_one() are missing the
IPA pointer parameter is missing in (a bug that shows up only when
IPA_VALIDATE is defined).  Don't bother checking whether hashed
table memory regions are valid if hashed tables are not supported.

With those things fixed, have these table validation functions built
unconditionally (not dependent on IPA_VALIDATE).

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>