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as expected there was no problem to use sunxi_board_init directly
from u-boot. Failure on A13 was a timing issue in the host side
script (need to wait for DRAM init to finish before trying next
fel operation)

For some reason cubieboard no longer works with this. a13-olinuxino do
work however. Needs further analysis.

This reverts commit de093ee7.

Conflicts:
	felboot/main.c

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