pkg/debian: Disable CONFIG_DEBUG_MISC in kernel config

This should only be used for debugging.

pkg/debian/kernel/ubuntu.config

@@ -11,6 +11,7 @@
 # CONFIG_SAMPLES is not set
 # CONFIG_STM_DUMMY is not set
 # CONFIG_TEST_BPF is not set
+# CONFIG_DEBUG_MISC is not set
 
 ##
 ## Don't build atomisp