configs/pine64: bump U-Boot version to 2024.07

configs/pine64: bump U-Boot version to 2024.07

Update U-Boot to fix the following error when building with
python-setuptools >= 69, that is, since 6b62384e3d
("package/python-setuptools: bump to version 69.0.3"):

  packaging.version.InvalidVersion: Invalid version: 'u-boot-2019.01'
  make[5]: *** [scripts/dtc/pylibfdt/Makefile:27: scripts/dtc/pylibfdt/_libfdt.so] Error 1
  make[4]: *** [scripts/Makefile.build:434: scripts/dtc/pylibfdt] Error 2
  make[4]: *** Waiting for unfinished jobs....
  make[3]: *** [scripts/Makefile.build:434: scripts/dtc] Error 2
  make[2]: *** [Makefile:508: scripts] Error 2
  make[1]: *** [package/pkg-generic.mk:289: output/build/uboot-2019.01/.stamp_built] Error 2
  make: *** [Makefile:83: _all] Error 2

Use SPL and U-Boot FIT image combined into u-boot-sunxi-with-spl.bin.

Do not use the optional System Control Processor (SCP) firmware pointing
the SCP env variable to /dev/null.

Signed-off-by: Mattia Narducci <[email protected]>
Signed-off-by: Thomas Petazzoni <[email protected]>