The MX6QDL_PAD_EIM_D22 pad is already handled in the common
imx6qdl-wandboard.dtsi file.

Remove it from the local hog group to avoid the following runtime error:

[    0.117763] imx6q-pinctrl 20e0000.pinctrl: pin MX6Q_PAD_EIM_D22 already requested by 20e0000.pinctrl; cannot claim for regulator-usbotgvbus
[    0.117785] imx6q-pinctrl 20e0000.pinctrl: pin-42 (regulator-usbotgvbus) status -22
[    0.117802] imx6q-pinctrl 20e0000.pinctrl: could not request pin 42 (MX6Q_PAD_EIM_D22) from group usbotgvbusgrp on device 20e0000.pinctrl
[    0.117822] reg-fixed-voltage regulator-usbotgvbus: Error applying setting, reverse things back
[    0.117844] reg-fixed-voltage: probe of regulator-usbotgvbus failed with error -22
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>