micropython: upgrade to 1.26.0, reverted single commit.

Migrated all patches from the previous version.

A change in the Findpicotool.cmake script in the pico-sdk led to a
downgrade of picotool, which incorporated mbedtls into the build, which
itself is not buildable with cmake versions < 3.5.

The commit which made this isolated change was reverted. Future versions
of micropython will use pico-sdk 2.2.0 or newer, where this problem is
fixed, and picotool is pinned to a release version.

software/modules/audiocore/module.c

@@ -90,9 +90,9 @@ static mp_obj_t audiocore_put(mp_obj_t self_in, mp_obj_t buffer)
     (void)self;
     mp_buffer_info_t bufinfo;
     if (!mp_get_buffer(buffer, &bufinfo, MP_BUFFER_READ))
-        mp_raise_ValueError("not a read buffer");
+        mp_raise_ValueError(MP_ERROR_TEXT("not a read buffer"));
     if (bufinfo.typecode != 'b' && bufinfo.typecode != 'B')
-        mp_raise_ValueError("unsupported buffer type");
+        mp_raise_ValueError(MP_ERROR_TEXT("unsupported buffer type"));
     unsigned to_copy = bufinfo.len;
 
     const uint32_t flags = spin_lock_blocking(shared_context.lock);
@@ -144,7 +144,7 @@ static mp_obj_t audiocore_set_volume(mp_obj_t self_in, mp_obj_t volume_obj)
     struct audiocore_obj *self = MP_OBJ_TO_PTR(self_in);
     const int volume = mp_obj_get_int(volume_obj);
     if (volume < 0 || volume > 255)
-        mp_raise_ValueError("volume out of range");
+        mp_raise_ValueError(MP_ERROR_TEXT("volume out of range"));
     multicore_fifo_push_blocking(AUDIOCORE_CMD_SET_VOLUME);
     multicore_fifo_push_blocking(AUDIOCORE_MAX_VOLUME * volume / 255);
     wake_core1();

software/modules/rp2_sd/module.c

@@ -66,9 +66,9 @@ static mp_obj_t sdcard_readblocks(mp_obj_t self_obj, mp_obj_t block_obj, mp_obj_
     const int start_block = mp_obj_get_int(block_obj);
     mp_buffer_info_t bufinfo;
     if (!mp_get_buffer(buf_obj, &bufinfo, MP_BUFFER_WRITE))
-        mp_raise_ValueError("Not a write buffer");
+        mp_raise_ValueError(MP_ERROR_TEXT("Not a write buffer"));
     if (bufinfo.len % SD_SECTOR_SIZE != 0)
-        mp_raise_ValueError("Buffer length is invalid");
+        mp_raise_ValueError(MP_ERROR_TEXT("Buffer length is invalid"));
     const int nblocks = bufinfo.len / SD_SECTOR_SIZE;
     for (int block = 0; block < nblocks; block++) {
         // TODO: Implement CMD18 read multiple blocks
@@ -85,9 +85,9 @@ static mp_obj_t sdcard_writeblocks(mp_obj_t self_obj, mp_obj_t block_obj, mp_obj
     const int start_block = mp_obj_get_int(block_obj);
     mp_buffer_info_t bufinfo;
     if (!mp_get_buffer(buf_obj, &bufinfo, MP_BUFFER_READ))
-        mp_raise_ValueError("Not a read buffer");
+        mp_raise_ValueError(MP_ERROR_TEXT("Not a read buffer"));
     if (bufinfo.len % SD_SECTOR_SIZE != 0)
-        mp_raise_ValueError("Buffer length is invalid");
+        mp_raise_ValueError(MP_ERROR_TEXT("Buffer length is invalid"));
     const int nblocks = bufinfo.len / SD_SECTOR_SIZE;
     for (int block = 0; block < nblocks; block++) {
         // TODO: Implement CMD25 write multiple blocks