usb: phy: tegra: Keep CPU interrupts enabled

There is no good reason for disabling of CPU interrupts in order to
protect the utmip_pad_count modification.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Link: https://lore.kernel.org/r/20200106013416.9604-17-digetx@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/phy/phy-tegra-usb.c

@@ -310,7 +310,6 @@ static int utmip_pad_power_on(struct tegra_usb_phy *phy)
 {
 	struct tegra_utmip_config *config = phy->config;
 	void __iomem *base = phy->pad_regs;
-	unsigned long flags;
 	u32 val;
 	int err;
 
@@ -318,7 +317,7 @@ static int utmip_pad_power_on(struct tegra_usb_phy *phy)
 	if (err)
 		return err;
 
-	spin_lock_irqsave(&utmip_pad_lock, flags);
+	spin_lock(&utmip_pad_lock);
 
 	if (utmip_pad_count++ == 0) {
 		val = readl_relaxed(base + UTMIP_BIAS_CFG0);
@@ -336,7 +335,7 @@ static int utmip_pad_power_on(struct tegra_usb_phy *phy)
 		writel_relaxed(val, base + UTMIP_BIAS_CFG0);
 	}
 
-	spin_unlock_irqrestore(&utmip_pad_lock, flags);
+	spin_unlock(&utmip_pad_lock);
 
 	clk_disable_unprepare(phy->pad_clk);
 
@@ -346,7 +345,6 @@ static int utmip_pad_power_on(struct tegra_usb_phy *phy)
 static int utmip_pad_power_off(struct tegra_usb_phy *phy)
 {
 	void __iomem *base = phy->pad_regs;
-	unsigned long flags;
 	u32 val;
 	int ret;
 
@@ -354,7 +352,7 @@ static int utmip_pad_power_off(struct tegra_usb_phy *phy)
 	if (ret)
 		return ret;
 
-	spin_lock_irqsave(&utmip_pad_lock, flags);
+	spin_lock(&utmip_pad_lock);
 
 	if (!utmip_pad_count) {
 		dev_err(phy->u_phy.dev, "UTMIP pad already powered off\n");
@@ -368,7 +366,7 @@ static int utmip_pad_power_off(struct tegra_usb_phy *phy)
 		writel_relaxed(val, base + UTMIP_BIAS_CFG0);
 	}
 ulock:
-	spin_unlock_irqrestore(&utmip_pad_lock, flags);
+	spin_unlock(&utmip_pad_lock);
 
 	clk_disable_unprepare(phy->pad_clk);