fuzzing_engine: Add fuzzing engine uclass

This new class of device will provide fuzzing inputs from a fuzzing
engine.

Signed-off-by: Andrew Scull <ascull@google.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/Kconfig b/drivers/Kconfig
index b26ca8c..8b6fead 100644
--- a/drivers/Kconfig
+++ b/drivers/Kconfig
@@ -40,6 +40,8 @@
 
 source "drivers/firmware/Kconfig"
 
+source "drivers/fuzz/Kconfig"
+
 source "drivers/fpga/Kconfig"
 
 source "drivers/gpio/Kconfig"