staging: rtl8723bs: add spaces around operator

fix the following post-commit hook checkpatch warning:

CHECK: spaces preferred around that '+' (ctx:VxV)
29: FILE: drivers/staging/rtl8723bs/hal/rtl8723b_hal_init.c:2238:
+			hal_get_chnl_group_8723b(ch+1, &group);
Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Link: https://lore.kernel.org/r/e9f65e7600a3c935ef9c310e782790e04cc1f17f.1626874164.git.fabioaiuto83@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8723bs/hal/rtl8723b_hal_init.c

@@ -2235,7 +2235,7 @@ void Hal_EfuseParseTxPowerInfo_8723B(
 		for (ch = 0 ; ch < CHANNEL_MAX_NUMBER; ch++) {
 			u8 group = 0;
 
-			hal_get_chnl_group_8723b(ch+1, &group);
+			hal_get_chnl_group_8723b(ch + 1, &group);
 
 			if (ch == 14-1) {
 				pHalData->Index24G_CCK_Base[rfPath][ch] = pwrInfo24G.IndexCCK_Base[rfPath][5];