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This patch updates the state machine to "not present" if the bpmp
firmware is not found in the system during boot. The suspend
handler also checks now if the interface exists, before updating
the internal state machine.

Reported by: Kalyani Chidambaram Vaidyanathan <kalyanic@nvidia.com>

Change-Id: If8fd7f8e412bb603944555c24826855226e7f48c
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>