OMAP_HSMMC: Migration to IRQ threaded handler

Changed the mmc card detect request_irq() to request_threaded_irq().
Removed sceduled work in the ISR and replaced with thread.

Change-Id: I02c1fb0353bd3a7ce939a80e0f8cd57c4aafec8c
Signed-off-by: Naga Venkata Srikanth V <vnv.srikanth@samsung.com>
Signed-off-by: Oleg_Kosheliev <oleg.kosheliev@ti.com>