cnss2: Add WCN7850 device ID to cnss_get_bus_type() API

WCN7850 device ID is missing from cnss_get_bus_type() API.
Hence add it.

Change-Id: I9eaf82dadcf715fb8a5d223a432b0135ccd0a6a7
Signed-off-by: Yue Ma <yuem@codeaurora.org>