Checking smp2p_state using IS_ERR_OR_NULL returns true every time
for Adrastea based targets.

So add a new API to validate smp2p state which returns true only
if the device id is WCN6750_DEVICE_ID or WCN6450_DEVICE_ID or
wpss_supported is enabled.

Change-Id: I01237d9e7b47dd666a4987920ca73a3f8f584c87
CRs-Fixed: 3758894