mimxrt: update flash algorithms for MIMXRT1020

python tools/generate_flash_algo.py \
  MIMXRT1021_DFP/arm/MIMXRT1021_QuadSPI_4KB_SEC.FLM
  --pack-path NXP.MIMXRT1021_DFP.13.1.1.pack \
  -o source/family/freescale/mimxrt1020_spi_flash/flash_blob.c --stack-size 4096

Author: mbrossard