drm/i915/display: Move chunks of code out of bxt_set_cdclk()

No functional change. Moving segments out to simplify
bxt_set_cdlck()

v2: s/bxt_cdclk_pll/bxt_cdclk_pll_update (Jani)

Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Balasubramani Vivekanandan <balasubramani.vivekanandan@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Anusha Srivatsa <anusha.srivatsa@intel.com>
Reviewed-by: Balasubramani Vivekanandan <balasubramani.vivekanandan@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221025223042.138810-3-anusha.srivatsa@intel.com

drivers/gpu/drm/i915/display/intel_cdclk.c

@@ -1684,6 +1684,26 @@ static u32 cdclk_squash_waveform(struct drm_i915_private *dev_priv,
 	return 0xffff;
 }
 
+static void icl_cdclk_pll_update(struct drm_i915_private *i915, int vco)
+{
+	if (i915->display.cdclk.hw.vco != 0 &&
+	    i915->display.cdclk.hw.vco != vco)
+		icl_cdclk_pll_disable(i915);
+
+	if (i915->display.cdclk.hw.vco != vco)
+		icl_cdclk_pll_enable(i915, vco);
+}
+
+static void bxt_cdclk_pll_update(struct drm_i915_private *i915, int vco)
+{
+	if (i915->display.cdclk.hw.vco != 0 &&
+	    i915->display.cdclk.hw.vco != vco)
+		bxt_de_pll_disable(i915);
+
+	if (i915->display.cdclk.hw.vco != vco)
+		bxt_de_pll_enable(i915, vco);
+}
+
 static void bxt_set_cdclk(struct drm_i915_private *dev_priv,
 			  const struct intel_cdclk_config *cdclk_config,
 			  enum pipe pipe)
@@ -1719,21 +1739,10 @@ static void bxt_set_cdclk(struct drm_i915_private *dev_priv,
 	if (HAS_CDCLK_CRAWL(dev_priv) && dev_priv->display.cdclk.hw.vco > 0 && vco > 0) {
 		if (dev_priv->display.cdclk.hw.vco != vco)
 			adlp_cdclk_pll_crawl(dev_priv, vco);
-	} else if (DISPLAY_VER(dev_priv) >= 11) {
-		if (dev_priv->display.cdclk.hw.vco != 0 &&
-		    dev_priv->display.cdclk.hw.vco != vco)
-			icl_cdclk_pll_disable(dev_priv);
-
-		if (dev_priv->display.cdclk.hw.vco != vco)
-			icl_cdclk_pll_enable(dev_priv, vco);
-	} else {
-		if (dev_priv->display.cdclk.hw.vco != 0 &&
-		    dev_priv->display.cdclk.hw.vco != vco)
-			bxt_de_pll_disable(dev_priv);
-
-		if (dev_priv->display.cdclk.hw.vco != vco)
-			bxt_de_pll_enable(dev_priv, vco);
-	}
+	} else if (DISPLAY_VER(dev_priv) >= 11)
+		icl_cdclk_pll_update(dev_priv, vco);
+	else
+		bxt_cdclk_pll_update(dev_priv, vco);
 
 	waveform = cdclk_squash_waveform(dev_priv, cdclk);