ARM: dts: msm: Add volume up key configuration for QRD845

Volume up key is connected to PM8998 GPIO6 on QRD845, add the
configuration for it can be detected.

Change-Id: I95262174543fad3940de8ac78906521002cf2f3c
Signed-off-by: Fenglin Wu <fenglinw@codeaurora.org>
1 file changed