soc: qcom: glink_pkt: Exit if device handle is NULL

In notify_state_worker function, device handle is restored, if
it is NULL. This leads to use after free in glink_queue_rx_intent.

Do not restore device handle.

CRs-Fixed: 2162377
Change-Id: Ie1a60309889001bb38aa7975b40c7de6e9a09c7a
Signed-off-by: Dhoat Harpal <hdhoat@codeaurora.org>