Change simulation handshaking GPIOs
Change simulation handshaking GPIOs

Per discussion with Toshiba, change the handshaking GPIOs for
simulation from GPIO 6 & 7 to GPIO 16 & 17, so we can verify the
code on HAPS board.

Testing Done:  Use a scope to monitor GPIO16 and a wire to toggle
               GPIO17, the handshaking sequence works as expected.
Bug Number:    Trivial
Review URL:    https://reviews.leaflabs.com/r/1485/
Reviewed by:   Morgan Girling <girling_morgan@projectara.com>

Signed-off-by: Jun Li <4a139eac5426aee89571cee0a0f52cc73d82e960@projectara.com>

projectara/bootrom,gregkh/bootrom