exec: make qemu_get_ram_ptr private

It is a private interface between exec.c and memory.c.
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

include/exec/cpu-common.h

@@ -49,8 +49,6 @@ typedef void CPUWriteMemoryFunc(void *opaque, hwaddr addr, uint32_t value);
 typedef uint32_t CPUReadMemoryFunc(void *opaque, hwaddr addr);
 
 void qemu_ram_remap(ram_addr_t addr, ram_addr_t length);
-/* This should only be used for ram local to a device.  */
-void *qemu_get_ram_ptr(ram_addr_t addr);
 /* This should not be used by devices.  */
 int qemu_ram_addr_from_host(void *ptr, ram_addr_t *ram_addr);
 ram_addr_t qemu_ram_addr_from_host_nofail(void *ptr);

include/exec/memory-internal.h

@@ -46,6 +46,7 @@ void address_space_destroy_dispatch(AddressSpace *as);
 ram_addr_t qemu_ram_alloc_from_ptr(ram_addr_t size, void *host,
                                    MemoryRegion *mr);
 ram_addr_t qemu_ram_alloc(ram_addr_t size, MemoryRegion *mr);
+void *qemu_get_ram_ptr(ram_addr_t addr);
 void qemu_ram_free(ram_addr_t addr);
 void qemu_ram_free_from_ptr(ram_addr_t addr);