bluetooth: hci_intel: Replace GFP_ATOMIC with GFP_KERNEL in inject_cmd_complete()

inject_cmd_complete() is only called by intel_dequeue(),
which is never called in atomic context.

inject_cmd_complete() calls bt_skb_alloc() with GFP_ATOMIC,
which is not necessary.
GFP_ATOMIC can be replaced with GFP_KERNEL.

This is found by a static analysis tool named DCNS written by myself.
I also manually check the kernel code before reporting it.
Signed-off-by: NJia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

drivers/bluetooth/hci_intel.c

@@ -458,7 +458,7 @@ static int inject_cmd_complete(struct hci_dev *hdev, __u16 opcode)
 	struct hci_event_hdr *hdr;
 	struct hci_ev_cmd_complete *evt;
 
-	skb = bt_skb_alloc(sizeof(*hdr) + sizeof(*evt) + 1, GFP_ATOMIC);
+	skb = bt_skb_alloc(sizeof(*hdr) + sizeof(*evt) + 1, GFP_KERNEL);
 	if (!skb)
 		return -ENOMEM;