Merge branch 'bugfix/partition_write_encrypted' into 'master'

Allow writes to encrypted partitions

There is a size alignment requirement but it is checked by
spi_flash_write_encrypted. However, this check flat-out bans encrypted
writes.

Original PR on Github: https://github.com/espressif/esp-idf/pull/249

See merge request !432

components/spi_flash/partition.c

@@ -230,10 +230,6 @@ esp_err_t esp_partition_write(const esp_partition_t* partition,
                              size_t dst_offset, const void* src, size_t size)
 {
     assert(partition != NULL);
-    //todo : need add ecrypt write support ,size must be 32-bytes align 
-    if(partition->encrypted == true) {
-        return ESP_FAIL;
-    }
     if (dst_offset > partition->size) {
         return ESP_ERR_INVALID_ARG;
     }