hv: pirq: clean up unnecessary fields of irq_desc

This commit cleans up fiels of struct irq_desc:
- remove name, irq_desc_state, irq_cnt and irq_lost_cnt which are not used.
- remove irq_ prefix of irq_lock field of struct irq_desc;
- change enum irq_state to enum irq_use_state;

Signed-off-by: Yan, Like <like.yan@intel.com>
Reviewed-by: Li, Fei <fei1.li@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>

hypervisor/common/ptdev.c

@@ -136,7 +136,7 @@ ptdev_activate_entry(struct ptdev_remapping_info *entry, uint32_t phys_irq)
 
 	/* register and allocate host vector/irq */
 	retval = request_irq(phys_irq, ptdev_interrupt_handler,
-				         (void *)entry, "dev assign");
+				         (void *)entry);
 
 	ASSERT(retval >= 0, "dev register failed");
 	entry->allocated_pirq = (uint32_t)retval;