37e28522c2
For secure app verification during OTA update case, the image was getting memory mapped twice and hence the failure in verification. Modified from memory mapped flash read to SPI flash read approach for the MMU page size from image header. Regression from 07318a49874d9b3be7fd1b81aa6657050497c511 Closes https://github.com/espressif/esp-idf/issues/15936