ARM: dts: qcom: msm8226: Add MMCC node

Add a node for the Multimedia Clock Controller found on MSM8226.

Signed-off-by: Rayyan Ansari <rayyan@ansari.sh>
Signed-off-by: Matti Lehtimäki <matti.lehtimaki@gmail.com>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221002122859.75525-2-matti.lehtimaki@gmail.com