twl4030-gpio: Remove default pullup enable/disable of GPIO

One twl4030_request_gpio() should not tamper with the pullup
enabling/disabling of the rest of the GPIOs. So removing the default
pullup values written to REG_GPIOPUPDCTR1.

Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Girish S G <girishsg@ti.com>
Signed-off-by: Jagadeesh Bhaskar Pakaravoor <j-pakaravoor@ti.com>
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>