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same code but the util_printf.c one was missing copyright attribution
and slightly hacked up.

Fix fel-gpio & pio tools

ignore user_type in android nand MBR; these can be other than 0 or 2
contrary to Allwinner's expectations
allow the user to set the user_type from the command line
(optional -- backwards compatible with existing usage

needed for A31 support. closes issue #9
Signed-off-by: Alejandro Mery <amery@geeks.cl>

and remove unused macro