cnss2: Clear CNSS_DEV_ERR_NOTIFY after collecting firmware dump

CNSS_DEV_ERR_NOTIFY should not be cleared before collecting firmware
dump as device is still in asserted state. Clear it after collecting
firmware dump.

Change-Id: Ic57c65d8ffa1806a0af83e653d6573f19ab1e705
Signed-off-by: Yue Ma <yuem@codeaurora.org>