mt76: usb: remove unneeded {put,get}_unaligned

Compiler give us guarantees on variables alignment, so use
an variable as buffer when read/write registers and remove
unneeded {put,get}_unaligned.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt76.h

@@ -390,7 +390,10 @@ enum mt76u_out_ep {
 #define MCU_RESP_URB_SIZE	1024
 struct mt76_usb {
 	struct mutex usb_ctrl_mtx;
-	u8 data[32];
+	union {
+		u8 data[32];
+		__le32 reg_val;
+	};
 
 	struct tasklet_struct rx_tasklet;
 	struct delayed_work stat_work;

drivers/net/wireless/mediatek/mt76/usb.c

@@ -95,9 +95,9 @@ static u32 __mt76u_rr(struct mt76_dev *dev, u32 addr)
 
 	ret = __mt76u_vendor_request(dev, req,
 				     USB_DIR_IN | USB_TYPE_VENDOR,
-				     0, offset, usb->data, sizeof(__le32));
+				     0, offset, &usb->reg_val, sizeof(__le32));
 	if (ret == sizeof(__le32))
-		data = get_unaligned_le32(usb->data);
+		data = le32_to_cpu(usb->reg_val);
 	trace_usb_reg_rr(dev, addr, data);
 
 	return data;
@@ -131,10 +131,10 @@ static void __mt76u_wr(struct mt76_dev *dev, u32 addr, u32 val)
 	}
 	offset = addr & ~MT_VEND_TYPE_MASK;
 
-	put_unaligned_le32(val, usb->data);
+	usb->reg_val = cpu_to_le32(val);
 	__mt76u_vendor_request(dev, req,
 			       USB_DIR_OUT | USB_TYPE_VENDOR, 0,
-			       offset, usb->data, sizeof(__le32));
+			       offset, &usb->reg_val, sizeof(__le32));
 	trace_usb_reg_wr(dev, addr, val);
 }