targphys.h: Don't define target_phys_addr_t for user-mode emulators

Commit 4be403c8 accidentally defined the target_phys_addr_t type when
building user-mode emulators. Since the type doesn't really make
any sense except for system emulators, avoid defining it when building
in user mode.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Acked-by: NAndreas Färber <afaerber@suse.de>
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

targphys.h

@@ -3,6 +3,8 @@
 #ifndef TARGPHYS_H
 #define TARGPHYS_H
 
+#ifndef CONFIG_USER_ONLY
+
 #define TARGET_PHYS_ADDR_BITS 64
 /* target_phys_addr_t is the type of a physical address (its size can
    be different from 'target_ulong').  */
@@ -18,3 +20,5 @@ typedef uint64_t target_phys_addr_t;
 #define TARGET_PRIXPHYS PRIX64
 
 #endif
+
+#endif