gpu: ipu-v3: image-convert: Combine rotate/no-rotate irq handlers

commit 0f6245f4 upstream.

Combine the rotate_irq() and norotate_irq() handlers into a single
eof_irq() handler.

Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>