drm/tilcdc: Remove the duplicate LCDC_INT_ENABLE_SET_REG in registers[]

Removes the duplicate LCDC_INT_ENABLE_SET_REG-entry in registers array.

Signed-off-by: Jyri Sarha <jsarha@ti.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ti.com>