Pass struct omap_hdmi to the irq handler since it will need access
to hdmi.core.

Do not clear the IRQ_HDMI_CORE bit: that will be controlled by the
HDMI CEC code.
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>