Makefile: use $(qemu_confdir) instead of $(sysconfdir)/qemu

Instead of hardcoding the directory suffix, use the qemu-specific
directory variable.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

Makefile

@@ -281,8 +281,8 @@ ifdef CONFIG_VIRTFS
 	$(INSTALL_DATA) fsdev/virtfs-proxy-helper.1 "$(DESTDIR)$(mandir)/man1"
 endif
 install-sysconfig:
-	$(INSTALL_DIR) "$(DESTDIR)$(sysconfdir)/qemu"
-	$(INSTALL_DATA) $(SRC_PATH)/sysconfigs/target/target-x86_64.conf "$(DESTDIR)$(sysconfdir)/qemu"
+	$(INSTALL_DIR) "$(DESTDIR)$(qemu_confdir)"
+	$(INSTALL_DATA) $(SRC_PATH)/sysconfigs/target/target-x86_64.conf "$(DESTDIR)$(qemu_confdir)"
 
 install: all $(if $(BUILD_DOCS),install-doc) install-sysconfig
 	$(INSTALL_DIR) "$(DESTDIR)$(bindir)"