HID: playstation: Fix memory leak in dualshock4_get_calibration_data()

The memory allocated for buf is not freed in the error paths when
ps_get_report() fails. Free buf before jumping to transfer_failed label

Fixes: 947992c ("HID: playstation: DS4: Fix calibration workaround for clone devices")
Signed-off-by: Abdun Nihaal <nihaal@cse.iitm.ac.in>
Reviewed-by: Silvan Jegen <s.jegen@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>

Author: Abdun Nihaal

drivers/hid/hid-playstation.c

@@ -1942,6 +1942,7 @@ static int dualshock4_get_calibration_data(struct dualshock4 *ds4)
 					 "Failed to retrieve DualShock4 calibration info: %d\n",
 					 ret);
 				ret = -EILSEQ;
+				kfree(buf);
 				goto transfer_failed;
 			} else {
 				break;
@@ -1959,6 +1960,7 @@ static int dualshock4_get_calibration_data(struct dualshock4 *ds4)
 
 		if (ret) {
 			hid_warn(hdev, "Failed to retrieve DualShock4 calibration info: %d\n", ret);
+			kfree(buf);
 			goto transfer_failed;
 		}
 	}