mfd: rave-sp: Avoid unnecessary use of comma operator

Although it does not seem to have any untoward side-effects,
the use of ';' to separate to assignments seems more appropriate than ','.

Flagged by clang-17 -Wcomma

No functional change intended. Compile tested only.
Signed-off-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20240123-rave-sp-comma-v1-1-84e9b15ba205@kernel.orgSigned-off-by: Lee Jones <lee@kernel.org>

drivers/mfd/rave-sp.c

@@ -358,7 +358,7 @@ int rave_sp_exec(struct rave_sp *sp,
 
 	ackid       = atomic_inc_return(&sp->ackid);
 	reply.ackid = ackid;
-	reply.code  = rave_sp_reply_code((u8)command),
+	reply.code  = rave_sp_reply_code((u8)command);
 
 	mutex_lock(&sp->bus_lock);