target/s390x: Replace MO_TE -> MO_BE

target/s390x: Replace MO_TE -> MO_BE

We only build the S390x target using big endianness order,
therefore the MO_TE definitions expand to the big endian
one. Use the latter which is more explicit.

Mechanical change running:

  $ sed -i -e s/MO_TE/MO_BE/ \
        $(git grep -wl MO_TE target/s390x/)

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Reviewed-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20251224162036.90404-5-philmd@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>