build: pkg anti-pattern: use defaults

Use the defaults in the pkg check where the default error message is
sufficient to identify which package is missing.

Change-Id: Iba453ba564da46c020e9cf72d7fb6c998d9904ab
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/configure.ac b/configure.ac
index 07521ba..a0b7cd1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -46,17 +46,13 @@
         AC_SUBST([OESDK_TESTCASE_FLAGS], [$testcase_flags])
     )
 
-    PKG_CHECK_MODULES([SDBUSPLUS], [sdbusplus],,\
-        AC_MSG_ERROR(["Requires sdbusplus package."]))
-    PKG_CHECK_MODULES([PHOSPHOR_LOGGING], [phosphor-logging],,\
-        AC_MSG_ERROR(["Requires phosphor-logging package."]))
-    PKG_CHECK_MODULES([OPENPOWER_DBUS_INTERFACES], [openpower-dbus-interfaces],,\
-        AC_MSG_ERROR(["Requires openpower-dbus-interfaces package."]))
-    PKG_CHECK_MODULES([PHOSPHOR_DBUS_INTERFACES], [phosphor-dbus-interfaces],,\
-        AC_MSG_ERROR(["Requires phosphor-dbus-interfaces package."]))
+    PKG_CHECK_MODULES([SDBUSPLUS], [sdbusplus])
+    PKG_CHECK_MODULES([PHOSPHOR_LOGGING], [phosphor-logging])
+    PKG_CHECK_MODULES([OPENPOWER_DBUS_INTERFACES], [openpower-dbus-interfaces])
+    PKG_CHECK_MODULES([PHOSPHOR_DBUS_INTERFACES], [phosphor-dbus-interfaces])
 
     # Check for sdbusplus
-    PKG_CHECK_MODULES([SDBUSPLUS], [sdbusplus],, [AC_MSG_ERROR(["sdbusplus packaged required and not found"])])
+    PKG_CHECK_MODULES([SDBUSPLUS], [sdbusplus])
 
     # Check for sdbus++ tool
     AC_PATH_PROG([SDBUSPLUSPLUS], [sdbus++])