i40e: use functions to enable and disable icr 0

Introduce i40e_irq_dynamic_disable_icr0 and use it and its previously-
extant counterpart when appropriate.

Change-Id: Ieb4037874fba2e96fc2354b34a97a3cb8f6490f3
Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Kavindya Deegala <kavindya.s.deegala@intel.com>
Tested-by: Sibai Li <sibai.li@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index e48e1c8..94d0e45 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -2543,6 +2543,19 @@
 }
 
 /**
+ * i40e_irq_dynamic_disable_icr0 - Disable default interrupt generation for icr0
+ * @pf: board private structure
+ **/
+void i40e_irq_dynamic_disable_icr0(struct i40e_pf *pf)
+{
+	struct i40e_hw *hw = &pf->hw;
+
+	wr32(hw, I40E_PFINT_DYN_CTL0,
+	     I40E_ITR_NONE << I40E_PFINT_DYN_CTLN_ITR_INDX_SHIFT);
+	i40e_flush(hw);
+}
+
+/**
  * i40e_irq_dynamic_enable_icr0 - Enable default interrupt generation for icr0
  * @pf: board private structure
  **/