Use phosphor-dbus-interfaces directly

Change-Id: I6d65c4a582115a1280ed705eb33f6c354d001f21
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/configure.ac b/configure.ac
index a7e9b9c..6b2a5e1 100755
--- a/configure.ac
+++ b/configure.ac
@@ -12,6 +12,10 @@
 
 # Check for libraries
 PKG_CHECK_MODULES([SYSTEMD], [libsystemd >= 221])
+PKG_CHECK_MODULES([PHOSPHOR_DBUS_INTERFACES], [phosphor-dbus-interfaces],,\
+    AC_MSG_ERROR(["Requires phosphor-dbus-interfaces package."]))
+PKG_CHECK_MODULES([SDBUSPLUS], [sdbusplus],,
+    AC_MSG_ERROR(["Requires sdbusplus package."]))
 
 # Checks for library functions
 LT_INIT # Required for systemd linking