OMAP: hsmmc: Rename the device and driver

Modifying the device & driver name from "mmci-omap-hs" to
"omap_hsmmc".

Signed-off-by: Kishore Kadiyala <kishore.kadiyala@ti.com>
Acked-by: Benoit <Cousson&lt;b-cousson@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>