arm64: dts: qcom: msm8998: Add I2C pinctrl and fix BLSP2_I2C naming

The BLSP2-connected interfaces started from 0 which is.. misleading
to say the least.. the clock names corresponding to these started
from 1, so let's align to that so as to reduce confusion.

Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Tested-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
Link: https://lore.kernel.org/r/20210109163001.146867-4-konrad.dybcio@somainline.org


Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>