staging: wfx: drop unused variable

Since the commit 3f84adfe ("staging: wfx: remove hack about tx_rate
policies"), the variable "count" is no more used in wfx_tx_policy_build().

Notice that there were two instances of the variable "count" in
wfx_tx_policy_build(). This patch also solves this cosmetic issue.

Reported-by: kbuild test robot <lkp@intel.com>
Fixes: 3f84adfe ("staging: wfx: remove hack about tx_rate policies")
Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20200526171821.934581-2-Jerome.Pouiller@silabs.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>