bpf: Remove unneeded semicolon

Eliminate the following coccicheck warning:
/kernel/bpf/trampoline.c:101:2-3: Unneeded semicolon

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20220725222733.55613-1-yang.lee@linux.alibaba.com

kernel/bpf/trampoline.c

@@ -98,7 +98,7 @@ static int bpf_tramp_ftrace_ops_func(struct ftrace_ops *ops, enum ftrace_ops_cmd
 	default:
 		ret = -EINVAL;
 		break;
-	};
+	}
 
 	mutex_unlock(&tr->mutex);
 	return ret;