USB: HSIC SMSC HUB: Add support for standalone HSIC configuration

When model-id is passed as 0, interpret it as standalone HSIC
configuration. Add HSIC platform device and don't look for HUB
resources. This is required to support both stand alone and HUB
configurations on different boards based on the same SoC.

Change-Id: Iec081799048dd93ece1472d95a7e1c27f91fb9b9
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>