ws2812: add support for the ESP32-C3 processor

This adds support to the WS2812 for the ESP32-C3 processor
which is a RISC-V processor from Espressif.

Signed-off-by: deadprogram <ron@hybridgroup.com>

ws2812/ws2812_tinygoriscv.go

@@ -1,4 +1,4 @@
-//go:build tinygo.riscv32
+//go:build tinygo.riscv32 && !esp32c3
 
 package ws2812
 
@@ -7,9 +7,6 @@ import "machine"
 // Send a single byte using the WS2812 protocol.
 func (d Device) WriteByte(c byte) error {
 	switch machine.CPUFrequency() {
-	case 160_000_000: // 160MHz, e.g. esp32c3
-		d.writeByte160(c)
-		return nil
 	case 320_000_000: // 320MHz, e.g. fe310
 		d.writeByte320(c)
 		return nil