pinctrl: tegra-xusb: Return void in padctl enable/disable functions

Make the padctl functions a bit simpler by returning void instead of
always '0'.  The callers - phy init/exit - still need to return 0, but
these are smaller function without if/branching.

Acked-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Linus Walleij <linusw@kernel.org>

Author: krzk

drivers/pinctrl/tegra/pinctrl-tegra-xusb.c

@@ -474,7 +474,7 @@ static const struct pinconf_ops tegra_xusb_padctl_pinconf_ops = {
 #endif
 };
 
-static int tegra_xusb_padctl_enable(struct tegra_xusb_padctl *padctl)
+static void tegra_xusb_padctl_enable(struct tegra_xusb_padctl *padctl)
 {
 	u32 value;
 
@@ -501,10 +501,9 @@ static int tegra_xusb_padctl_enable(struct tegra_xusb_padctl *padctl)
 
 out:
 	mutex_unlock(&padctl->lock);
-	return 0;
 }
 
-static int tegra_xusb_padctl_disable(struct tegra_xusb_padctl *padctl)
+static void tegra_xusb_padctl_disable(struct tegra_xusb_padctl *padctl)
 {
 	u32 value;
 
@@ -534,21 +533,24 @@ static int tegra_xusb_padctl_disable(struct tegra_xusb_padctl *padctl)
 
 out:
 	mutex_unlock(&padctl->lock);
-	return 0;
 }
 
 static int tegra_xusb_phy_init(struct phy *phy)
 {
 	struct tegra_xusb_padctl *padctl = phy_get_drvdata(phy);
 
-	return tegra_xusb_padctl_enable(padctl);
+	tegra_xusb_padctl_enable(padctl);
+
+	return 0;
 }
 
 static int tegra_xusb_phy_exit(struct phy *phy)
 {
 	struct tegra_xusb_padctl *padctl = phy_get_drvdata(phy);
 
-	return tegra_xusb_padctl_disable(padctl);
+	tegra_xusb_padctl_disable(padctl);
+
+	return 0;
 }
 
 static int pcie_phy_power_on(struct phy *phy)