target/s390x: introduce (test|set)_be_bit

target/s390x: introduce (test|set)_be_bit

Using ordinary bitmap operations to set/test bits does not work properly
on architectures !s390x. Let's drop (test|set)_bit_inv and introduce
(test|set)_be_bit instead. These functions work on uint8_t array, not on
unsigned longs arrays and are for now only used in the context of
CPU features.

Signed-off-by: David Hildenbrand <[email protected]>
Message-Id: <20170720123721[email protected]>
Signed-off-by: Cornelia Huck <[email protected]>