media: mxc_v4l2_capture: check for init_camera_struct failure

Return with error if init_camera_struct has failed instead of crashing.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
PCI: ventana: irq-mapping workaround for GW16082

The GW16082 MiniPCI Expansion Mezzanine has its PCI IRQ's reversed.  This
patch adds a custom swizzle function as a work-around until a more suitable
solution can be created.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>