wlan: Add get_wake_irq functionality

Change-Id: Ic41f06c509b2e625dc9ec4131903db6920c5fd4e
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>

include/linux/wlan_plat.h

@@ -23,6 +23,7 @@ struct wifi_platform_data {
 	int (*set_carddetect)(int val);
 	void *(*mem_prealloc)(int section, unsigned long size);
 	int (*get_mac_addr)(unsigned char *buf);
+	int (*get_wake_irq)(void);
 	void *(*get_country_code)(char *ccode, u32 flags);
 };