usb: phy: qmp: Remove both phy_clk_scheme based init functionality

Currently QMP PHY driver expects to have both se_clk and diff_clk
based PHY initialization sequence from devicetree. This change
removes need of both phy_clk_scheme based init sequence as on newer
platform QMP PHY only uses one of phy_clk_scheme.

Signed-off-by: Mayank Rana <mrana@codeaurora.org>

Documentation/devicetree/bindings/usb/msm-phy.txt

@@ -115,8 +115,8 @@ Optional properties:
    the USB PHY and the controller must rely on external VBUS notification in
    order to manually relay the notification to the SSPHY.
  - qcom,emulation: Indicates that we are running on emulation platform.
- - qcom,qmp-phy-init-seq: QMP PHY initialization sequence with reg, diff clk
-   value, single ended clk value, delay after register write.
+ - qcom,qmp-phy-init-seq: QMP PHY initialization sequence with reg offset, its
+   value, delay after register write.
  - qcom,qmp-phy-reg-offset: If present stores phy register offsets in an order
    defined in the phy driver.
 

drivers/usb/phy/phy-msm-ssusb-qmp.c

@@ -83,11 +83,10 @@ unsigned int qmp_phy_rev2[] = {
 	[USB3_PHY_START] = 0x608,
 };
 
-/* reg values to write based on the phy clk scheme selected */
+/* reg values to write */
 struct qmp_reg_val {
 	u32 offset;
-	u32 diff_clk_sel_val;
-	u32 se_clk_sel_val;
+	u32 val;
 	u32 delay;
 };
 
@@ -487,7 +486,6 @@ static int configure_phy_regs(struct usb_phy *uphy,
 {
 	struct msm_ssphy_qmp *phy = container_of(uphy, struct msm_ssphy_qmp,
 					phy);
-	bool diff_clk_sel = true;
 
 	if (!reg) {
 		dev_err(uphy->dev, "NULL PHY configuration\n");
@@ -495,9 +493,7 @@ static int configure_phy_regs(struct usb_phy *uphy,
 	}
 
 	while (reg->offset != -1) {
-		writel_relaxed(diff_clk_sel ?
-				reg->diff_clk_sel_val : reg->se_clk_sel_val,
-				phy->base + reg->offset);
+		writel_relaxed(reg->val, phy->base + reg->offset);
 		if (reg->delay)
 			usleep_range(reg->delay, reg->delay + 10);
 		reg++;