accel/tcg: Eliminate #if on HAVE_ATOMIC128 and HAVE_CMPXCHG128

These symbols will shortly become dynamic runtime tests and
therefore not appropriate for the preprocessor.  Use the
matching CONFIG_* symbols for that purpose.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
4 files changed