drm/amd/powerplay: functions's return state was reversed

In commit 195567e9,
use true/false instead of 1/0 to fix build warning.
But the original logic: '0' means true and '1' means false.
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/hwmgr/ppatomctrl.c

@@ -552,13 +552,13 @@ static bool atomctrl_lookup_gpio_pin(
 				pin_assignment->ucGpioPinBitShift;
 			gpio_pin_assignment->us_gpio_pin_aindex =
 				le16_to_cpu(pin_assignment->usGpioPin_AIndex);
-			return false;
+			return true;
 		}
 
 		offset += offsetof(ATOM_GPIO_PIN_ASSIGNMENT, ucGPIO_ID) + 1;
 	}
 
-	return true;
+	return false;
 }
 
 /**