rename HAVE_IOVEC to CONFIG_IOVEC

Signed-off-by: NJuan Quintela <quintela@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

configure

@@ -1733,7 +1733,7 @@ if test "$blobs" = "yes" ; then
   echo "INSTALL_BLOBS=yes" >> $config_host_mak
 fi
 if test "$iovec" = "yes" ; then
-  echo "#define HAVE_IOVEC 1" >> $config_host_h
+  echo "#define CONFIG_IOVEC 1" >> $config_host_h
 fi
 if test "$preadv" = "yes" ; then
   echo "#define CONFIG_PREADV 1" >> $config_host_h

qemu-common.h

@@ -39,8 +39,8 @@
 #define ENOMEDIUM ENODEV
 #endif
 
-#ifndef HAVE_IOVEC
-#define HAVE_IOVEC
+#ifndef CONFIG_IOVEC
+#define CONFIG_IOVEC
 struct iovec {
     void *iov_base;
     size_t iov_len;