Added CIRCUITPY_AUDIOBUSIO_PDMIN guard macros to allow code to build on boards that don't support PDMIn.

Author: JetForMe

ports/espressif/common-hal/audiobusio/PDMIn.c

@@ -17,6 +17,7 @@
 
 
 
+#if CIRCUITPY_AUDIOBUSIO_PDMIN
 
 
 
@@ -126,3 +127,5 @@ uint8_t common_hal_audiobusio_pdmin_get_bit_depth(audiobusio_pdmin_obj_t *self)
 uint32_t common_hal_audiobusio_pdmin_get_sample_rate(audiobusio_pdmin_obj_t *self) {
     return self->sample_rate;
 }
+
+#endif

ports/espressif/common-hal/audiobusio/PDMIn.h

@@ -11,6 +11,7 @@
 #include "common-hal/audiobusio/__init__.h"
 #include "common-hal/microcontroller/Pin.h"
 
+#if CIRCUITPY_AUDIOBUSIO_PDMIN
 
 typedef struct {
     i2s_t i2s;
@@ -20,3 +21,5 @@ typedef struct {
     uint32_t sample_rate;
     uint8_t bit_depth;
 } audiobusio_pdmin_obj_t;
+
+#endif