staging: rtl8723bs: hal: Add spaces around operators in HalBtc8723b2Ant.c

Added spaces around operators in file HalBtc8723b2Ant.c. Issue detected
by checkpatch.pl. Spaces are preferred to improve readibility.

Signed-off-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
Link: https://lore.kernel.org/r/20210406170011.20753-1-fmdefrancesco@gmail.com


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