change HOST_SOLARIS to CONFIG_SOLARIS{_VERSION}

Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/dyngen-exec.h b/dyngen-exec.h
index c007763..c1072cd 100644
--- a/dyngen-exec.h
+++ b/dyngen-exec.h
@@ -75,7 +75,7 @@
 #define AREG1 "s0"
 #define AREG2 "s1"
 #elif defined(__sparc__)
-#ifdef HOST_SOLARIS
+#ifdef CONFIG_SOLARIS
 #define AREG0 "g2"
 #define AREG1 "g3"
 #define AREG2 "g4"