usb: phy: samsung: Pass enable/disable callbacks through driver data

To remove unnecessary if statements, this patch introduces phy_enable
and phy_disable callbacks in driver data structure that implement
SoC-specific PHY initialization and deinitialization.

Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/phy/phy-samsung-usb2.c b/drivers/usb/phy/phy-samsung-usb2.c
index a01247e..1c3abd4 100644
--- a/drivers/usb/phy/phy-samsung-usb2.c
+++ b/drivers/usb/phy/phy-samsung-usb2.c
@@ -291,10 +291,7 @@
 	samsung_usbphy_cfg_sel(sphy);
 
 	/* Initialize usb phy registers */
-	if (sphy->drv_data->cpu_type == TYPE_EXYNOS5250)
-		samsung_exynos5_usb2phy_enable(sphy);
-	else
-		samsung_usb2phy_enable(sphy);
+	sphy->drv_data->phy_enable(sphy);
 
 	spin_unlock_irqrestore(&sphy->lock, flags);
 
@@ -334,10 +331,7 @@
 	}
 
 	/* De-initialize usb phy registers */
-	if (sphy->drv_data->cpu_type == TYPE_EXYNOS5250)
-		samsung_exynos5_usb2phy_disable(sphy);
-	else
-		samsung_usb2phy_disable(sphy);
+	sphy->drv_data->phy_disable(sphy);
 
 	/* Enable phy isolation */
 	if (sphy->plat && sphy->plat->pmu_isolation)
@@ -443,6 +437,8 @@
 	.devphy_en_mask		= S3C64XX_USBPHY_ENABLE,
 	.rate_to_clksel		= samsung_usbphy_rate_to_clksel_64xx,
 	.set_isolation		= NULL, /* TODO */
+	.phy_enable		= samsung_usb2phy_enable,
+	.phy_disable		= samsung_usb2phy_disable,
 };
 
 static const struct samsung_usbphy_drvdata usb2phy_exynos4 = {
@@ -451,6 +447,8 @@
 	.hostphy_en_mask	= EXYNOS_USBPHY_ENABLE,
 	.rate_to_clksel		= samsung_usbphy_rate_to_clksel_64xx,
 	.set_isolation		= samsung_usbphy_set_isolation_4210,
+	.phy_enable		= samsung_usb2phy_enable,
+	.phy_disable		= samsung_usb2phy_disable,
 };
 
 static struct samsung_usbphy_drvdata usb2phy_exynos5 = {
@@ -459,6 +457,8 @@
 	.hostphy_reg_offset	= EXYNOS_USBHOST_PHY_CTRL_OFFSET,
 	.rate_to_clksel		= samsung_usbphy_rate_to_clksel_4x12,
 	.set_isolation		= samsung_usbphy_set_isolation_4210,
+	.phy_enable		= samsung_exynos5_usb2phy_enable,
+	.phy_disable		= samsung_exynos5_usb2phy_disable,
 };
 
 #ifdef CONFIG_OF