esp3s3 & esp32c3 PWM implements (#5215)

* esp3s3 pwm

* esp32s3-pwm: added spi alias for esp32s3 for tests

* esp32s3-pwm: fix linters

* esp32s3-pwm: fix rename

* esp32s3-pwm: replace if to switch

* esp32s3-pwm: chip specific registry

* esp32s3-pwm: fix linters

src/examples/pwm/esp32c3-supermini.go

@@ -0,0 +1,11 @@
+//go:build esp32c3_supermini
+
+package main
+
+import "machine"
+
+var (
+	pwm  = machine.PWM0
+	pinA = machine.GPIO5
+	pinB = machine.GPIO6
+)

src/examples/pwm/esp32s3-wroom1.go

@@ -0,0 +1,11 @@
+//go:build esp32s3_wroom1
+
+package main
+
+import "machine"
+
+var (
+	pwm  = machine.PWM0
+	pinA = machine.GPIO17
+	pinB = machine.GPIO18
+)

src/examples/pwm/xiao_esp32s3.go

@@ -0,0 +1,11 @@
+//go:build xiao_esp32s3
+
+package main
+
+import "machine"
+
+var (
+	pwm  = machine.PWM0
+	pinA = machine.D0
+	pinB = machine.D1
+)