linux-user: Move get_vdso_image_info to arm/elfload.c

Rename from vdso_image_info to avoid a symbol clash.
Define HAVE_VDSO_IMAGE_INFO to signal the external definition exists.
Provide fallback versions for other targets.

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