HID: pidff: Add missing spaces

Fixes checkpatch.pl errors

Signed-off-by: Tomasz Pakuła <[e-mail]>
Signed-off-by: Jiri Kosina <[e-mail]>

drivers/hid/usbhid/hid-pidff.c

···
 	int exponent = field->unit_exponent;
 
 	pr_debug("time field exponent: %d\n", exponent);
-	for (;exponent < FF_TIME_EXPONENT; exponent++)
+	for (; exponent < FF_TIME_EXPONENT; exponent++)
 		scaled_time *= 10;
-	for (;exponent > FF_TIME_EXPONENT; exponent--)
+	for (; exponent > FF_TIME_EXPONENT; exponent--)
 		scaled_time /= 10;
 
 	pr_debug("time calculated from %d to %d\n", time, scaled_time);
···
 		hid_dbg(pidff->hid, "DEVICE_CONTROL is a bitmask\n");
 
 		/* Clear current bitmask */
-		for(i = 0; i < sizeof(pidff_device_control); i++) {
+		for (i = 0; i < sizeof(pidff_device_control); i++) {
 			index = pidff->control_id[i];
 			if (index < 1)
 				continue;
···
 	struct hid_device *hid = pidff->hid;
 
 	/* Repeat if PID_SIMULTANEOUS_MAX < 2 to make sure it's correct */
-	for(i = 0; i < 20; i++) {
+	for (i = 0; i < 20; i++) {
 		hid_hw_request(hid, pidff->reports[PID_POOL], HID_REQ_GET_REPORT);
 		hid_hw_wait(hid);
 
···
 	case FF_INERTIA:
 	case FF_FRICTION:
 		if (!old) {
-			switch(effect->type) {
+			switch (effect->type) {
 			case FF_SPRING:
 				type_id = PID_SPRING;
 				break;