net/qede/base: code cleanup

net/qede/base: code cleanup

- Remove some dead definitions, function declarations and unused
   variables
 - Remove an obsolete workaround from ecore_int_igu_enable()
 - Remove set variables that are not used
 - Remove needless check in  ecore_init_wfq_param() when configuring
   minimum vport BW. We already check whether total for all vports is
   greater than the PF's, so no need to check independently the current
   requested configuration as well.

Signed-off-by: Rasesh Mody <rasesh.mody@cavium.com>