twl4030-gpio: pullup/pulldown init

twl4030-gpio: pullup/pulldown init

Finish moving initialization of pullups and pulldowns for twl4030
GPIOs into board specific init.  Remove partial/incorrect init code
for that from the hsmmc glue.

Doing this right requires some attention from board init logic,
based on how the TWL chip is wired.  Letting digital inputs float
will waste power.  Everyone with board schematics should update
their board init code so it matches their boards; meanwhile,
this returns to "current" behavior (all pullups disabled) but
finally offers a way to do it "right".

Note that the ULPI pins won't need this attention (muxed against
gpio{3-5,9-12,14} pins), and neither will ones with external
pullups or pulldowns (conventional for MMC/SD card detect).

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>