uboot-imx

fdt: Try to use fdt_address_cells()/fdt_size_cells()

Use these new functions where possible. They default to a value of 2 so we
cannot use them in some places where we need a default value of 1.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@ti.com>