ARM: dts: msm: Fix the pinctrl dt name for sdm845

Using a wrong name for the pinctrl node for sdm845 results into
compilation error when compiled for sdm830 platform as we use same label
for two different nodes.

Change-Id: Ic72e68ad81c8590fceac12516e3a9cacfa2cb322
Signed-off-by: Channagoud Kadabi <ckadabi@codeaurora.org>