Revert "e1000: fix sw fw sync on igb i210/i211"

Revert "e1000: fix sw fw sync on igb i210/i211"

This reverts commit 17da7120249bfdef877f46be5bbcb3cc01212eb9.

The i210/i211 do have the SW_FW_SYNC (0x5b5c) register and this is what should
be used when acquiring the semaphore.

I believe the issue that this patch was trying to resolve is now resolved
by properly releasing the semaphore once no longer needed.

Cc: Marcel Ziswiler <[email protected]>
Cc: Marek Vasut <[email protected]>
Cc: Aneesh Bansal <[email protected]>
Cc: Naveen Burmi <[email protected]>
Cc: Po Liu <[email protected]>
Cc: Bin Meng <[email protected]>
Cc: Alison Wang <[email protected]>
Cc: Reinhard Arlt <[email protected]>
Cc: Shengzhou Liu <[email protected]>
Cc: York Sun <[email protected]>
Signed-off-by: Tim Harvey <[email protected]>
Tested-by: Bin Meng <[email protected]>
Tested-by: Marcel Ziswiler <[email protected]>