ARM: dts: msm: configure HOME key correctly for 8940 CDP/RCM

MSM8940 CDP/RCM devices have a HOME key button which is
connected to the host processor via GPIO 86. This HOME key
is not present in any other devices. As msm8940's pinctrl
file is shared for all the supported 8940 targets, the
pinctrl configuration of HOME key is added specifically
only for the targets that need it(instead of adding it
in the shared DT file). This is done by adding a pinctrl
entry for HOME key specifically in CDP's DT file for
the gpio-keys driver.

Currently MSM8940 CDP/RCM device's DT files first include
the device specific DT file(which has a configuration
defined for HOME key) and then later include the generic
pinctrl DT file as a result  of which the pinctrl node
for gpio-keys is overridden with the generic configuration
and HOME key does not work. Changing the inclusion order
causes the HOME key to work fine.

CRs-Fixed: 1020103
Change-Id: I5d0b1b4f1a62a2ffcbad7854e742e510f2d0ccdb
Signed-off-by: Abinaya P <abinayap@codeaurora.org>
Signed-off-by: Himanshu Aggarwal <haggarwa@codeaurora.org>