staging: rtl8723bs: core: Remove unnecessary parentheses

Issue found with checkpatch.pl.
CHECK: Remove unnecessary parentheses

Signed-off-by: Kushal Kothari <kushalkothari285@gmail.com>
Link: https://lore.kernel.org/r/f4df671b9bf23f9e8995dd03472a520d40377d7a.1634967010.git.kushalkothari285@gmail.com


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