arm64: dts: qcom: msm8996: standardize blsp indexing

Use one-based indexing throughout the file for BLSP devices to avoid
confusion. Most of the node names and labels are consistent already.
This patch just fixes a few pinconf node names to match the one-based
indexing used in the label names.

Signed-off-by: Harry Austen <hpausten@protonmail.com>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221023204505.115141-2-hpausten@protonmail.com