common: Pass the boot device into spl_boot_mode()

common: Pass the boot device into spl_boot_mode()

The SPL code already knows which boot device it calls the spl_boot_mode()
on, so pass that information into the function. This allows the code of
spl_boot_mode() avoid invoking spl_boot_device() again, but it also lets
board_boot_order() correctly alter the behavior of the boot process.

The later one is important, since in certain cases, it is desired that
spl_boot_device() return value be overriden using board_boot_order().

Signed-off-by: Marek Vasut <[email protected]>
Cc: Andreas Bießmann <[email protected]>
Cc: Albert Aribaud <[email protected]>
Cc: Tom Rini <[email protected]>
Reviewed-by: Andreas Bießmann <[email protected]>
[add newly introduced zynq variant]
Signed-aff-by: Andreas Bießmann <[email protected]>