Gdbstub: handle read of fpscr

Signed-off-by: Fabien Chouteau <chouteau@adacore.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
diff --git a/gdbstub.c b/gdbstub.c
index 12dd100..1d99e19 100644
--- a/gdbstub.c
+++ b/gdbstub.c
@@ -733,7 +733,7 @@
             {
                 if (gdb_has_xml)
                     return 0;
-                GET_REG32(0); /* fpscr */
+                GET_REG32(env->fpscr);
             }
         }
     }