kernel: Import function to install kernel modules from Q

 * The new refactored function doesn't work with shell expanded
   variables, like our $$modules.

 * This is the _easy_ fix.
   A proper fix would imply generating the module list into a make variable
   from the shell variable, but with kati that looks unfeasable (to me...)

Change-Id: I8198c62fa93ad94d4b9bf7175fe5eea452c243ea