Use of uint32_t instead of size_t for spi_flash_mmap

[nkolban]

Another trivial report ...

In esp_spi_flash.h we define spi_flash_mmap as:

esp_err_t spi_flash_mmap(uint32_t src_addr, size_t size, spi_flash_mmap_memory_t memory,
                         const void** out_ptr, spi_flash_mmap_handle_t* out_handle);

Notice that the first parameter is defined as uint32_t. In all the other definitions, we had defined flash address locations as size_t. This issue suggests changing the type of this function to also be size_t to maintain consistency.