Staging: rtl8723bs: hal: Fix comparison to bool in if statements

Fix following warnings reported by coccicheck:
WARNING: Comparison to bool
by using !x in place of (x == false) and
x in place of (x == true).

Signed-off-by: Puranjay Mohan <puranjay12@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>