configure.ac: Disable PCSC related code on EMBEDDED

The EMBEDDED conditional is used for building inside 'bare iron'
embedded devices like OsmocomBB phones.  There's no PC/SC in them.

Change-Id: I2ef7561d7fdb1ef1c060f8ac73d8588fc0f8eb3f
diff --git a/configure.ac b/configure.ac
index bbbe241..20b5e63 100644
--- a/configure.ac
+++ b/configure.ac
@@ -209,6 +209,7 @@
 	AM_CONDITIONAL(ENABLE_CTRL, false)
 	AM_CONDITIONAL(ENABLE_UTILITIES, false)
 	AM_CONDITIONAL(ENABLE_GB, false)
+	AM_CONDITIONAL(ENABLE_PCSC, false)
 	AC_DEFINE([PANIC_INFLOOP],[1],[Use infinite loop on panic rather than fprintf/abort])
 fi