linux-user: Rename TARGET_QEMU_ESIGRETURN to QEMU_ESIGRETURN

This value is fully internal to qemu, and so is not a TARGET define.

Reviewed-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
diff --git a/linux-user/ppc/signal.c b/linux-user/ppc/signal.c
index 90a0369..176c9d8 100644
--- a/linux-user/ppc/signal.c
+++ b/linux-user/ppc/signal.c
@@ -591,13 +591,13 @@
 
     unlock_user_struct(sr, sr_addr, 1);
     unlock_user_struct(sc, sc_addr, 1);
-    return -TARGET_QEMU_ESIGRETURN;
+    return -QEMU_ESIGRETURN;
 
 sigsegv:
     unlock_user_struct(sr, sr_addr, 1);
     unlock_user_struct(sc, sc_addr, 1);
     force_sig(TARGET_SIGSEGV);
-    return -TARGET_QEMU_ESIGRETURN;
+    return -QEMU_ESIGRETURN;
 }
 #endif /* !defined(TARGET_PPC64) */
 
@@ -646,12 +646,12 @@
     target_restore_altstack(&rt_sf->uc.tuc_stack, env);
 
     unlock_user_struct(rt_sf, rt_sf_addr, 1);
-    return -TARGET_QEMU_ESIGRETURN;
+    return -QEMU_ESIGRETURN;
 
 sigsegv:
     unlock_user_struct(rt_sf, rt_sf_addr, 1);
     force_sig(TARGET_SIGSEGV);
-    return -TARGET_QEMU_ESIGRETURN;
+    return -QEMU_ESIGRETURN;
 }
 
 /* This syscall implements {get,set,swap}context for userland.  */
@@ -704,7 +704,7 @@
             /* We cannot return to a partially updated context.  */
             force_sig(TARGET_SIGSEGV);
         }
-        return -TARGET_QEMU_ESIGRETURN;
+        return -QEMU_ESIGRETURN;
     }
 
     return 0;