staging: rtl8723bs: remove unnecessary parentheses in if condition in core/rtw_cmd.c

fix post-commit hook checkpatch issue:

WARNING: Unnecessary parentheses
166: FILE: drivers/staging/rtl8723bs/core/rtw_cmd.c:2000:
+	if ((pcmd->res != H2C_SUCCESS))

Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Link: https://lore.kernel.org/r/04aa9d68d6d28d295001dde7cc14f33ef83f8046.1617545239.git.fabioaiuto83@gmail.com


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