ARM: dts: Add support for apq8074v2.2 hardware variants

Previously, apq8074v2.2 booted using a configuration inherited
from msm8974-v2.0-1.dtsi. Inherit settings from msm8974-v2.2.dtsi
instead.

Change-Id: I257e77ef0983a011ad3d9249a6c22fb32c15b0b7
Signed-off-by: Matt Wagantall <mattw@codeaurora.org>