Staging: udlfb: add udlfb driver to build

This adds the udlfb driver to the build system

Cc: Roberto De Ioris <roberto@unbit.it>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/staging/Kconfig b/drivers/staging/Kconfig
index df74262..348bf61 100644
--- a/drivers/staging/Kconfig
+++ b/drivers/staging/Kconfig
@@ -127,5 +127,7 @@
 
 source "drivers/staging/pata_rdc/Kconfig"
 
+source "drivers/staging/udlfb/Kconfig"
+
 endif # !STAGING_EXCLUDE_BUILD
 endif # STAGING