include: Move QEMU_MAP_* constants to mmap-alloc.h

include: Move QEMU_MAP_* constants to mmap-alloc.h

The QEMU_MAP_* constants are used only as arguments to the
qemu_ram_mmap() function.  Move them to mmap-alloc.h, where that
function's prototype is defined.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220208200856.3558249-4-peter.maydell@linaro.org