staging: rtl8723bs: Using comparison to true is error prone

clear below issues reported by checkpatch.pl:

CHECK: Using comparison to false is error prone
CHECK: Using comparison to true is error pron
Signed-off-by: John Oldman <john.oldman@polehill.co.uk>
Link: https://lore.kernel.org/r/20200707114128.30312-1-john.oldman@polehill.co.ukSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>