beaglebone: watchdog should be in-kernel, not a module

...because we want it to become active as soon as possible, not only
once a module is loaded.

Change-Id: I7052e3f8186a7862960e62d9f5aed2afb99ab841
diff --git a/board/czechlight/beaglebone/kconfig b/board/czechlight/beaglebone/kconfig
new file mode 100644
index 0000000..2871883
--- /dev/null
+++ b/board/czechlight/beaglebone/kconfig
@@ -0,0 +1 @@
+CONFIG_OMAP_WATCHDOG=y