linux-user: Move init_guest_commpage to x86_64/elfload.c

Rename INIT_GUEST_COMMPAGE to HAVE_GUEST_COMMPAGE
to match the other HAVE_* defines.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
4 files changed