staging: rtl8723bs: Change return type of hal_btcoex_IsBtControlLps()

Change return type of hal_btcoex_IsBtControlLps from u8 to bool as it
only returns boolean values.
Change comparison to false within this function; check the boolean
variable directly instead.

Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com>
Link: https://lore.kernel.org/r/20190802062444.30384-2-nishkadg.linux@gmail.com


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