Input: elan_i2c - increment wakeup count if wake source

Notify the PM core that this device is the wake source. This helps
userspace daemon tracking the wake sources to identify the origin of the
wake.
Signed-off-by: NRavi Chandra Sadineni <ravisadineni@chromium.org>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/mouse/elan_i2c_core.c

@@ -981,6 +981,8 @@ static irqreturn_t elan_isr(int irq, void *dev_id)
 	if (error)
 		goto out;
 
+	pm_wakeup_event(dev, 0);
+
 	switch (report[ETP_REPORT_ID_OFFSET]) {
 	case ETP_REPORT_ID:
 		elan_report_absolute(data, report);