drm/i915/wm: rename intel_get_cxsr_latency -> pnv_get_cxsr_latency

Clarify that the function is specific to PNV, making subsequent changes
slightly easier to grasp.
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/7d4e3c9a4220ff84af2741e5cd7bb62d1b4f2a44.1718356614.git.jani.nikula@intel.comSigned-off-by: Jani Nikula <jani.nikula@intel.com>

drivers/gpu/drm/i915/display/i9xx_wm.c

@@ -70,7 +70,7 @@ static const struct cxsr_latency cxsr_latency_table[] = {
 	{0, 1, 400, 800, 6042, 36042, 6584, 36584},    /* DDR3-800 SC */
 };
 
-static const struct cxsr_latency *intel_get_cxsr_latency(struct drm_i915_private *i915)
+static const struct cxsr_latency *pnv_get_cxsr_latency(struct drm_i915_private *i915)
 {
 	int i;
 
@@ -637,7 +637,7 @@ static void pnv_update_wm(struct drm_i915_private *dev_priv)
 	u32 reg;
 	unsigned int wm;
 
-	latency = intel_get_cxsr_latency(dev_priv);
+	latency = pnv_get_cxsr_latency(dev_priv);
 	if (!latency) {
 		drm_dbg_kms(&dev_priv->drm,
 			    "Unknown FSB/MEM found, disable CxSR\n");
@@ -4029,7 +4029,7 @@ void i9xx_wm_init(struct drm_i915_private *dev_priv)
 		g4x_setup_wm_latency(dev_priv);
 		dev_priv->display.funcs.wm = &g4x_wm_funcs;
 	} else if (IS_PINEVIEW(dev_priv)) {
-		if (!intel_get_cxsr_latency(dev_priv)) {
+		if (!pnv_get_cxsr_latency(dev_priv)) {
 			drm_info(&dev_priv->drm,
 				 "failed to find known CxSR latency "
 				 "(found ddr%s fsb freq %d, mem freq %d), "