[PATCH v2] ARM: iop32x: fix power off handling for the EM7210 board

Linus Walleij [off-list ref] writes:

This board was missed when converting all the others to proper
abstracted GPIO handling. Fix it up the right way by requesting
and driving GPIO line 0 high through gpiolib to power off the
machine.

Cc: Arnaud Patard <redacted>
Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Walleij <redacted>

Queueing for fixes (w/ack from Arnd.)

Kevin