drm/i915/icl: remove intel_dpll_is_combophy()

This is only used in intel_display() and shouldn't be needed there.
We don't want to keep converting from pll id to pll type so just remove
the function.
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190309035727.25389-6-lucas.demarchi@intel.com

drivers/gpu/drm/i915/intel_display.c

@@ -9616,9 +9616,6 @@ static void icelake_get_ddi_pll(struct drm_i915_private *dev_priv,
 		temp = I915_READ(DPCLKA_CFGCR0_ICL) &
 		       DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(port);
 		id = temp >> DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(port);
-
-		if (WARN_ON(!intel_dpll_is_combophy(id)))
-			return;
 	} else if (intel_port_is_tc(dev_priv, port)) {
 		id = icl_tc_port_to_pll_id(intel_port_to_tc(dev_priv, port));
 	} else {

drivers/gpu/drm/i915/intel_dpll_mgr.c

@@ -2649,11 +2649,6 @@ enum intel_dpll_id icl_tc_port_to_pll_id(enum tc_port tc_port)
 	return tc_port + DPLL_ID_ICL_MGPLL1;
 }
 
-bool intel_dpll_is_combophy(enum intel_dpll_id id)
-{
-	return id == DPLL_ID_ICL_DPLL0 || id == DPLL_ID_ICL_DPLL1;
-}
-
 static bool icl_mg_pll_find_divisors(int clock_khz, bool is_dp, bool use_ssc,
 				     u32 *target_dco_khz,
 				     struct intel_dpll_hw_state *state)