Beken Led Strip 5 channel support

[PSMGoossens]

Component name

Beken SPI LED Strip

Link to component documentation on our website

https://esphome.io/components/light/beken_spi_led_strip/

Describe the enhancement

Support for 5 channel per led driver when using SM16703P. This support will create RGBCW support for SM16703P compatible devices.

Use cases

This would make it possible to convert some "Party lights from LSC" to ESPHome

Anything else?

OpenBeken has already implemented this functionality. This is the PR