ARM: dts: msm: Remove reset configuration for pm8226

Reset line connected to vol- key on 8226 platform and
does not need to support reset. PM8941 supported reset
because of a hardware bug and is not needed for pm8226.

CRs-fixed: 530299
Change-Id: I452bd246b655b9fbcc55e076a78503a8fc97da99
Signed-off-by: Mohan Pallaka <mpallaka@codeaurora.org>