staging: rtl8723bs: hal: Add spaces around operators in hal_btcoex.c

Added spaces around operators. Issue detected by checkpatch.pl.
Spaces around operators are preferred to improve readibility.

Signed-off-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
Link: https://lore.kernel.org/r/20210406181428.15097-1-fmdefrancesco@gmail.com


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