slim_ngd: Handle runtime-pm resume error gracefully

Runtime-pm resume for satellite driver may fail if ADSP is going
through subsystem-restart. Handle that error, and set runtime-pm's
status to suspended if resume fails. Resume typically fails due to
failure to wake slimbus from pause_clock. Make sure another wakeup
can be tried later when ADSP comes back up

Change-Id: Ie9b798f5506de89a37491dbc3798acaa24b98808
Signed-off-by: Sagar Dharia <sdharia@codeaurora.org>