usb: dwc2: use well defined macros for power_down

Use the well defined macros such as DWC2_POWER_DOWN_PARAM_NONE,
DWC2_POWER_DOWN_PARAM_PARTIAL and DWC2_POWER_DOWN_PARAM_HIBERNATION
to make code more readable.
Signed-off-by: NJisheng Zhang <Jisheng.Zhang@synaptics.com>
Acked-by: NMinas Harutyunyan <hminas@synopsys.com>
Link: https://lore.kernel.org/r/20200616162617.38365cc8@xhacker.debianSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/dwc2/hcd.c

@@ -3628,7 +3628,7 @@ static int dwc2_hcd_hub_control(struct dwc2_hsotg *hsotg, u16 typereq,
 				"SetPortFeature - USB_PORT_FEAT_SUSPEND\n");
 			if (windex != hsotg->otg_port)
 				goto error;
-			if (hsotg->params.power_down == 2)
+			if (hsotg->params.power_down == DWC2_POWER_DOWN_PARAM_HIBERNATION)
 				dwc2_enter_hibernation(hsotg, 1);
 			else
 				dwc2_port_suspend(hsotg, windex);
@@ -3646,7 +3646,7 @@ static int dwc2_hcd_hub_control(struct dwc2_hsotg *hsotg, u16 typereq,
 			break;
 
 		case USB_PORT_FEAT_RESET:
-			if (hsotg->params.power_down == 2 &&
+			if (hsotg->params.power_down == DWC2_POWER_DOWN_PARAM_HIBERNATION &&
 			    hsotg->hibernated)
 				dwc2_exit_hibernation(hsotg, 0, 1, 1);
 			hprt0 = dwc2_read_hprt0(hsotg);

drivers/usb/dwc2/params.c

@@ -68,14 +68,14 @@ static void dwc2_set_his_params(struct dwc2_hsotg *hsotg)
 	p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 <<
 		GAHBCFG_HBSTLEN_SHIFT;
 	p->change_speed_quirk = true;
-	p->power_down = false;
+	p->power_down = DWC2_POWER_DOWN_PARAM_NONE;
 }
 
 static void dwc2_set_s3c6400_params(struct dwc2_hsotg *hsotg)
 {
 	struct dwc2_core_params *p = &hsotg->params;
 
-	p->power_down = 0;
+	p->power_down = DWC2_POWER_DOWN_PARAM_NONE;
 	p->phy_utmi_width = 8;
 }
 
@@ -89,7 +89,7 @@ static void dwc2_set_rk_params(struct dwc2_hsotg *hsotg)
 	p->host_perio_tx_fifo_size = 256;
 	p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 <<
 		GAHBCFG_HBSTLEN_SHIFT;
-	p->power_down = 0;
+	p->power_down = DWC2_POWER_DOWN_PARAM_NONE;
 }
 
 static void dwc2_set_ltq_params(struct dwc2_hsotg *hsotg)
@@ -319,11 +319,11 @@ static void dwc2_set_param_power_down(struct dwc2_hsotg *hsotg)
 	int val;
 
 	if (hsotg->hw_params.hibernation)
-		val = 2;
+		val = DWC2_POWER_DOWN_PARAM_HIBERNATION;
 	else if (hsotg->hw_params.power_optimized)
-		val = 1;
+		val = DWC2_POWER_DOWN_PARAM_PARTIAL;
 	else
-		val = 0;
+		val = DWC2_POWER_DOWN_PARAM_NONE;
 
 	hsotg->params.power_down = val;
 }