Move counter set specific controls and functions to the asm/cpu_mcf.h
header file containg all counter facility support definitions.  Also
adapt few variable names and header file includes.  No functional changes.
Signed-off-by: Hendrik Brueckner <brueckner@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>