net: prestera: add missing ABI compatibility check

Size-check a type used for FW communication is packed as expected.

Signed-off-by: Oleksandr Mazur <oleksandr.mazur@plvision.eu>
Signed-off-by: Maksym Glubokiy <maksym.glubokiy@plvision.eu>
Link: https://lore.kernel.org/r/20220818111419.414877-1-maksym.glubokiy@plvision.eu


Signed-off-by: Jakub Kicinski <kuba@kernel.org>