Use sanitized headers in data-ipa-cfg-mgr makefiles

Change-Id: I43450840cb3fc8c288475c8ecb352dd3b4e6eafb
diff --git a/ipacm/src/Makefile.am b/ipacm/src/Makefile.am
index 250c32c..c43343a 100644
--- a/ipacm/src/Makefile.am
+++ b/ipacm/src/Makefile.am
@@ -1,7 +1,6 @@
 EXTRA_CPPFLAGS	= -DDEBUG
 AM_CPPFLAGS = -I./../inc \
-	      -I$(WORKSPACE)/data-ipa-cfg-mgr/ipanat/inc \
-	      -I$(WORKSPACE)/kernel/include \
+	      -I$(top_srcdir)/ipanat/inc \
 	      ${LIBXML_CFLAGS}
 AM_CPPFLAGS += -Wall -Wundef -Wno-trigraphs