esp32: Extend support for S2 series, and S3 where applicable.

Improvements made:
- PSRAM support for S2
- partition definition for 16MiB flash
- correct ADC and DAC pins
- correct GPIO and IRQ pins
- S3 components in CMakeLists

Based on original commit made by Seon Rozenblum aka @UnexpectedMaker.

Signed-off-by: Damien George <damien@micropython.org>

ports/esp32/main.c

@@ -42,6 +42,8 @@
 #include "esp32/spiram.h"
 #elif CONFIG_IDF_TARGET_ESP32S2
 #include "esp32s2/spiram.h"
+#elif CONFIG_IDF_TARGET_ESP32S3
+#include "esp32s3/spiram.h"
 #endif
 
 #include "py/stackctrl.h"
@@ -104,6 +106,18 @@ void mp_task(void *pvParameter) {
             mp_task_heap = malloc(mp_task_heap_size);
             break;
     }
+    #elif CONFIG_ESP32S2_SPIRAM_SUPPORT || CONFIG_ESP32S3_SPIRAM_SUPPORT
+    // Try to use the entire external SPIRAM directly for the heap
+    size_t mp_task_heap_size;
+    size_t esp_spiram_size = esp_spiram_get_size();
+    void *mp_task_heap = (void *)0x3ff80000 - esp_spiram_size;
+    if (esp_spiram_size > 0) {
+        mp_task_heap_size = esp_spiram_size;
+    } else {
+        // No SPIRAM, fallback to normal allocation
+        mp_task_heap_size = heap_caps_get_largest_free_block(MALLOC_CAP_8BIT);
+        mp_task_heap = malloc(mp_task_heap_size);
+    }
     #else
     // Allocate the uPy heap using malloc and get the largest available region
     size_t mp_task_heap_size = heap_caps_get_largest_free_block(MALLOC_CAP_8BIT);