Add (disabled) UPEK EikonII (TCRD4C) driver

The device driver is always disabled as it uses the same Device ID
as another working reader:
https://bugzilla.redhat.com/show_bug.cgi?id=504399#c38

libfprint/Makefile.am

@@ -2,6 +2,7 @@ lib_LTLIBRARIES = libfprint.la
 noinst_PROGRAMS = fprint-list-hal-info fprint-list-udev-rules
 MOSTLYCLEANFILES = $(hal_fdi_DATA) $(udev_rules_DATA)
 
+UPEKE2_SRC = drivers/upeke2.c
 UPEKTS_SRC = drivers/upekts.c
 UPEKTC_SRC = drivers/upektc.c
 UPEKSONLY_SRC = drivers/upeksonly.c
@@ -76,6 +77,10 @@ udev_rulesdir = $(sysconfdir)/udev/rules.d/
 $(udev_rules_DATA): fprint-list-udev-rules
 	$(builddir)/fprint-list-udev-rules > $@
 
+if ENABLE_UPEKE2
+DRIVER_SRC += $(UPEKE2_SRC)
+endif
+
 if ENABLE_UPEKTS
 DRIVER_SRC += $(UPEKTS_SRC)
 endif

libfprint/core.c

@@ -343,6 +343,9 @@ static struct fp_driver * const primitive_drivers[] = {
 #ifdef ENABLE_UPEKTS
 	&upekts_driver,
 #endif
+#ifdef ENABLE_UPEKE2
+    &upeke2_driver,
+#endif
 };
 
 static struct fp_img_driver * const img_drivers[] = {

libfprint/fp_internal.h

@@ -238,6 +238,9 @@ struct fp_img_driver {
 #ifdef ENABLE_UPEKTS
 extern struct fp_driver upekts_driver;
 #endif
+#ifdef ENABLE_UPEKE2
+extern struct fp_driver upeke2_driver;
+#endif
 #ifdef ENABLE_UPEKTC
 extern struct fp_img_driver upektc_driver;
 #endif