ixgbe(4): Fix enabling/disabling and reconfiguration of queues

[krzysztof.galazka_intel.com]

Summary

• Wrong order of casting and bit shift caused that enabling and disabling queues didn't work properly for queues number larger than 32. Use literals with right suffix instead.
• TX ring tail address was not updated during reinitiailzation of TX structures. It could block sending traffic.
• Also remove unused variables 'eims' and 'active_queues'.

Test Plan

Respectfully requesting our Validation Team to perform a test pass before committing.

[lukasz.szczepaniak_intel.com]

Tests were successfully passed for D20826 patch.