net/ixgbe/base: reduce delay for SWFW semaphore

net/ixgbe/base: reduce delay for SWFW semaphore

This patch reduces the SWFW semaphore/PHY Token retry delay.

ixgbe_release_swfw_sync_X540: Reduce 5 ms delay after releasing
semaphore to 2 ms. HW team indicated 1 ms delay would be sufficient
for FW access.

ixgbe_acquire_swfw_sync_X540: Remove 5 ms delay after acquiring
semaphore.

ixgbe_acquire_swfw_sync_X550a: Remove 5 ms delay since there are
two 2 ms delays in the semaphore release flow.

Signed-off-by: Xiao Wang <xiao.w.wang@intel.com>
Acked-by: Wenzhuo Lu <wenzhuo.lu@intel.com>