Do I need split the power plane?
Do not split the plane. The datasheet is suggesting that each pin be provided with a highly localized RC or LC filter. In other words, you place one R in series and one C in shunt very close to each VCC pin on the device.

It says nothing about splitting the plane. There is zero chance that splitting the plane will help you with EMI, and it will probably make it worse.

If you create a "local plane" fed with a ferrite (which is really just an inductor) and put a lot of capacitance on that local plane, you are, in essence, designing a patch antenna. If the VCC current demand happens to be near the resonant frequency of your patch antenna, you will have big EMI problems.

The only reason to split planes is to protect victim signals. It never provides any benefit to the aggressor signal or EMI.

Quote from the datasheet:
"It is recommended that the PCB have at least one solid ground plane and one solid VDD plane to provide a low impedance power source to the component."

I added the emphasis.