commit 53653c6b upstream.

In case of an invalid pin value bcm2835_pctl_dt_node_to_map()
would leak the pull configs of already assigned pins.
So avoid this by calling the free map function in error case.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Fixes: e1b2dc70 ("pinctrl: add bcm2835 driver")
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
[ luis: backported to 3.16:
  - file rename: drivers/pinctrl/bcm/pinctrl-bcm2835.c ->
    drivers/pinctrl/pinctrl-bcm2835.c ]
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>