ixgbe: refactor common start_hw code for 82599 and x540

Factored out the common start_hw code into a new function
ixgbe_start_hw_gen2() so that it can be used by x540 and 82599.

Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com>
Acked-by: Don Skidmore <donald.c.skidmore@intel.com>
Tested-by: Evan Swanson <evan.swanson@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/ixgbe/ixgbe_common.h b/drivers/net/ixgbe/ixgbe_common.h
index 508f635..2585bf3 100644
--- a/drivers/net/ixgbe/ixgbe_common.h
+++ b/drivers/net/ixgbe/ixgbe_common.h
@@ -35,6 +35,7 @@
 s32 ixgbe_init_ops_generic(struct ixgbe_hw *hw);
 s32 ixgbe_init_hw_generic(struct ixgbe_hw *hw);
 s32 ixgbe_start_hw_generic(struct ixgbe_hw *hw);
+s32 ixgbe_start_hw_gen2(struct ixgbe_hw *hw);
 s32 ixgbe_clear_hw_cntrs_generic(struct ixgbe_hw *hw);
 s32 ixgbe_read_pba_string_generic(struct ixgbe_hw *hw, u8 *pba_num,
                                   u32 pba_num_size);