configs/freescale_imx93evk: bump BSP components to lf-6.6.23-2.0.0

configs/freescale_imx93evk: bump BSP components to lf-6.6.23-2.0.0

Bump ATF, U-Boot and Linux kernel to the NXP BSP lf-6.6.23-2.0.0
versions.

Also, commit c05f27c8ae "configs/freescale_imx93evk: new defconfig"
introduced the custom hash files, but did not add
BR2_DOWNLOAD_FORCE_CHECK_HASHES=y in the defconfig. This commit fixes
this issue by adding this config directive. As a side note, commit
22fd54b737 "configs/freescale_imx93evk: Update to NXP lf-6.6.3-1.0.0"
updated the defconfig components version, but did not updated the
custom hash files, because they were ignored. This is why hashes were
still at version 6.1 whereas components where already at 6.6.

Since hashes were not enabled, this was not detected by
"make check-package", and the entry in ".checkpackageignore" was also
kept. This commit also removes this entry.

Finally, with the bump of BSP components, this commit updates the
custom hash files accordingly.

Signed-off-by: Julien Olivain <[email protected]>
Signed-off-by: Thomas Petazzoni <[email protected]>