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: I9222c872ae76c7fce1d05fde9fcbf14563fda447
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/configure.ac b/configure.ac
index 2f773c4..f030599 100644
--- a/configure.ac
+++ b/configure.ac
@@ -43,9 +43,9 @@
 # Checks for libraries.
 PKG_CHECK_MODULES([SYSTEMD], [libsystemd >= 221])
 PKG_CHECK_MODULES([CRYPTO], [libcrypto >= 1.0.2g], ,[AC_MSG_ERROR([can't find openssl libcrypto])])
-PKG_CHECK_MODULES([PHOSPHOR_LOGGING], [phosphor-logging],, [AC_MSG_ERROR([Could not find phosphor-logging...openbmc/phosphor-logging package required])])
-PKG_CHECK_MODULES([SDBUSPLUS], [sdbusplus],, AC_MSG_ERROR(["Requires sdbusplus package."]))
-PKG_CHECK_MODULES([PHOSPHOR_DBUS_INTERFACES], [phosphor-dbus-interfaces],, [AC_MSG_ERROR([Could not find phosphor-dbus-interfaces...openbmc/phosphor-dbus-interfaces package required])])
+PKG_CHECK_MODULES([PHOSPHOR_LOGGING], [phosphor-logging])
+PKG_CHECK_MODULES([SDBUSPLUS], [sdbusplus])
+PKG_CHECK_MODULES([PHOSPHOR_DBUS_INTERFACES], [phosphor-dbus-interfaces])
 AC_CHECK_LIB([mapper], [mapper_get_service], ,[AC_MSG_ERROR([Could not find libmapper...openbmc/phosphor-objmgr package required])])
 
 # Checks for header files.