configure: expand ${prefix} in create_config

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
diff --git a/configure b/configure
index c99461a..9d8b4b3 100755
--- a/configure
+++ b/configure
@@ -2073,8 +2073,7 @@
 echo "datadir=$datadir" >> $config_host_mak
 echo "sysconfdir=$sysconfdir" >> $config_host_mak
 echo "docdir=$docdir" >> $config_host_mak
-echo "CONFIG_QEMU_SHAREDIR=\"$prefix$datasuffix\"" >> $config_host_mak
-echo "CONFIG_QEMU_CONFDIR=\"$confdir\"" >> $config_host_mak
+echo "confdir=$confdir" >> $config_host_mak
 
 case "$cpu" in
   i386|x86_64|alpha|cris|hppa|ia64|m68k|microblaze|mips|mips64|ppc|ppc64|s390|s390x|sparc|sparc64)