Enable kernel & busybox features for RAUC

Change-Id: I3bf3c2673ed7c9c2d467292ef183aade3bbc628b
diff --git a/board/czechlight/common/kconfig b/board/czechlight/common/kconfig
index 9b0302f..2b794ed 100644
--- a/board/czechlight/common/kconfig
+++ b/board/czechlight/common/kconfig
@@ -48,6 +48,10 @@
 CONFIG_CFS_BANDWIDTH=y
 CONFIG_RT_GROUP_SCHED=n
 
+# rauc
+CONFIG_BLK_DEV_LOOP=y
+CONFIG_SQUASHFS=y
+
 # These are not needed, let's nuke them
 CONFIG_SOUND=n
 CONFIG_MD=n