fix sparc not solaris build

Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/Makefile.target b/Makefile.target
index 1b68c70..a4cb506 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -89,7 +89,7 @@
 endif
 
 ifeq ($(ARCH),sparc)
-  ifneq ($(CONFIG_SOLARIS),yes)
+  ifneq ($(CONFIG_SOLARIS),y)
     HELPER_CFLAGS+=-ffixed-i0
   endif
 endif