s390/ap: Extend struct ap_queue_status with some convenience fields

s390/ap: Extend struct ap_queue_status with some convenience fields

Sometimes there is a different view of the AP status word
needed. So here is slight rework of the struct ap_queue_status
to open up the possibility to have different ways of accessing
the AP status bits and fields.

The new struct ap_queue_status

struct ap_queue_status {
	union {
		unsigned int value			: 32;
		struct {
			unsigned int status_bits	: 8;
			unsigned int rc			: 8;
			unsigned int			: 16;
		};
		struct {
			unsigned int queue_empty	: 1;
			unsigned int replies_waiting	: 1;
			unsigned int queue_full		: 1;
			unsigned int			: 3;
			unsigned int async		: 1;
			unsigned int irq_enabled	: 1;
			unsigned int response_code	: 8;
			unsigned int			: 16;
		};
	};
};

comprises the old struct ap_queue_status but extends it
to have this also accessible as an unsigned int required
for example for a simple print or trace of the whole value.

Note that this rework is fully backward compatible to the
existing code exploiting the struct ap_queue_status.

Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewed-by: Anthony Krowiak <akrowiak@linux.ibm.com>
Reviewed-by: Holger Dengler <dengler@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>