drivers: ethernet: mcux: fix build warning

The ethernet HAL has a different uint32_t typedef than Zephyr's u32_t:
uint32_t in the HAL is long unsigned int, while in Zephyr it's
unsigned int. This is causing a build warning on GCC ("warning:
passing argument 2 of ‘ENET_GetRxFrameSize’ from incompatible pointer
type") when passing a u32_t* where ENET_GetRxFrameSize expects a
uint32_t*.

Add a cast to silence the warning.

Signed-off-by: Marti Bolivar <marti.bolivar@linaro.org>
1 file changed