cnss2: Load firmware image based on WLAN device version

Populate WLAN device version info from MHI and load firmware image
based on it. Also expose the same info to WLAN host driver.

Change-Id: Iab8e9219b37da8c75c80928b4bef9a76719e540c
Signed-off-by: Yue Ma <yuem@codeaurora.org>