cnss: merge cnss_wlan_status and cnss_driver_status

In current cnss platform driver, there are 2 enumerations stand for
wlan status: cnss_wlan_status and cnss_driver_status; while in cnss2,
there is only 1: cnss_driver_status.
It will lead to mismatch when co-working with the same wlan driver.
To fix this problem, merge the 2 definitions, make these 2 platform
drivers aligned.

CRs-Fixed: 2202980
Change-Id: If398597e54d55a6fa4a2553e48cc16f0a9f7340d
Signed-off-by: Yu Wang <yyuwang@codeaurora.org>