Staging: rtl8192e: Bool tests don't need comparisons

This patch removes comparisons to true/false values on bool variables.
Warning found by coccinelle:
"WARNING: Comparison to bool".

Signed-off-by: Cristina Opriceana <cristina.opriceana@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>