ARM: dts: msm: Remove unwanted compatible string for QUPV3 UART on sm8150

QUPV3 UART dtsi node has two separate compatible strings which are not
really needed. Instead keep the unique but different compatibility for
2-wire console UART and 4-wire HSUART node.

Change-Id: I2062c10dee9a227d0f94d40d1f24bc242d0a3231
Signed-off-by: Mukesh Kumar Savaliya <msavaliy@codeaurora.org>