arm64: dts: qcom: msm8996: Add blsp2_i2c3

Add a node for blsp2_i2c3 which is used for type-C port control chips
and speaker codecs on some devices.

Signed-off-by: Yassine Oudjana <y.oudjana@protonmail.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20210901193214.250375-3-y.oudjana@protonmail.com