mtr: drop unneeded 'call' from autotools-package invocation

Signed-off-by: Fabio Porcedda <fabio.porcedda@gmail.com>
Cc: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/mtr/mtr.mk

@@ -21,4 +21,4 @@ endif
 
 MTR_POST_PATCH_HOOKS += MTR_DISABLE_RES_NINIT
 
-$(eval $(call autotools-package))
+$(eval $(autotools-package))