rpi: Update environment to support booti and large initrd
The existing values don't provide for decompressing an arm64 boot-image.
Add those values and move things apart a bit so that a 50MB kernel can be
accommodated.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Christopher Obbard <christopher.obbard@linaro.org>
Tested-by: Christopher Obbard <christopher.obbard@linaro.org> # CM4 1G
Reviewed-by: Christopher Obbard <christopher.obbard@linaro.org>
Tested-by: Christopher Obbard <christopher.obbard@linaro.org> # CM4 1G