e1000e: cleanup: do not assign a variable a value when not necessary

Static analysis with cppcheck has shown a few instances of a variable
being reassigned a value before the old one has been used.  None of these
ever require the old value to be used so remove the old values.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c
index 12784e8..e386e95 100644
--- a/drivers/net/ethernet/intel/e1000e/netdev.c
+++ b/drivers/net/ethernet/intel/e1000e/netdev.c
@@ -3660,8 +3660,8 @@
 	e1e_flush();
 
 	/* Clear TSYNCRXCTL_VALID & TSYNCTXCTL_VALID bit */
-	regval = er32(RXSTMPH);
-	regval = er32(TXSTMPH);
+	er32(RXSTMPH);
+	er32(TXSTMPH);
 
 	/* Get and set the System Time Register SYSTIM base frequency */
 	ret_val = e1000e_get_base_timinca(adapter, &regval);
@@ -5834,7 +5834,7 @@
 	struct e1000_hw *hw = &adapter->hw;
 	u32 i, mac_reg;
 	u16 phy_reg, wuc_enable;
-	int retval = 0;
+	int retval;
 
 	/* copy MAC RARs to PHY RARs */
 	e1000_copy_rx_addrs_to_phy_ich8lan(hw);