evaluate: maps: check element data mapping matches set data definition

evaluate: maps: check element data mapping matches set data definition

This change is similar to
7f4d7fef31bd ("evaluate: check element key vs. set definition")

but this time for data mappings.

The included bogon asserts with:
BUG: invalid data expression type catch-all set element
nft: src/netlink.c:596: __netlink_gen_data: Assertion `0' failed.

after:
internal:0:0-0: Error: Element mapping mismatches map definition, expected packet mark, not 'invalid'

Signed-off-by: Florian Westphal <fw@strlen.de>
Reviewed-by: Pablo Neira Ayuso <pablo@netfilter.org>