genirq: Remove unused irq_chip_generic:: {type,polarity}_cache

The type_cache and polarity_cache members of struct irq_chip_generic are
unused. Remove them both along with their kernel-doc.

Found by https://github.com/jirislaby/clang-struct.

Signed-off-by: Jiri Slaby (SUSE) <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Link: https://lore.kernel.org/all/[email protected]

Author: Jiri Slaby (SUSE)

include/linux/irq.h

@@ -1040,8 +1040,6 @@ struct irq_chip_type {
  * @irq_base:		Interrupt base nr for this chip
  * @irq_cnt:		Number of interrupts handled by this chip
  * @mask_cache:		Cached mask register shared between all chip types
- * @type_cache:		Cached type register
- * @polarity_cache:	Cached polarity register
  * @wake_enabled:	Interrupt can wakeup from suspend
  * @wake_active:	Interrupt is marked as an wakeup from suspend source
  * @num_ct:		Number of available irq_chip_type instances (usually 1)
@@ -1068,8 +1066,6 @@ struct irq_chip_generic {
 	unsigned int		irq_base;
 	unsigned int		irq_cnt;
 	u32			mask_cache;
-	u32			type_cache;
-	u32			polarity_cache;
 	u32			wake_enabled;
 	u32			wake_active;
 	unsigned int		num_ct;