The I2C mux control relies on the SDP setting in the ESDP register
so it is necessary to restore the value after a MAC reset. So,
put the code in a function so it can be used in more than one place.
Fixes: d2e72774e5 ("ixgbe/base: support X550")
Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
Acked-by: Helin Zhang <helin.zhang@intel.com>