linux-phytec-ti

s390/irq: split irq stats for cpu-measurement alert facilities

CPU-measurement alerts are generated for different CPU-measurement
facilities, for example, the sampling and counter facilities.
Split the irq stats according to available facilities.

Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>