icnss: Check driver state before sending uevent in PD notifier

Send uevent to host driver only when it is available. Do not
send uevent when host driver is removed or is under SSR/PDR
state.

CRs-Fixed: 2122103
Change-Id: Iedfd115588eece708b45436921aafd7d1c495dbc
Signed-off-by: Yuanyuan Liu <yuanliu@codeaurora.org>