Update bootloader, u-boot tools to builds 7845945

git log --first-parent -100 --oneline --no-decorate 856ff5025e..c0d66ec9a4:
c0d66ec9a4 ANDROID: Fix qemu-minimal after upstream merge
40baf77485 Increase qemu-arm's CONFIG_SYS_MALLOC_LEN
f6a782610e ANDROID: Disable libcrypto support
1f7466f563 ANDROID: am57xx_evm build fix
f127098070 Revert "pci: Remove CONFIG_PCI_ENUM_ONLY as it's not used (any more)"
8a87d6dd8d ANDROID: rockchip: Disable HISPD mode on eMMC
6b04a14284 Merge commit 'v2021.10' into aosp/master
1d057fdc7f Revert "Revert "Makefile: Handle building in a very old build directory""
81d5473c7c Revert "ANDROID: rockchip: Disable HISPD mode on eMMC"
20ce525cc8 Revert "Revert "pci: Remove CONFIG_PCI_ENUM_ONLY as it's not used (any more)""

Test: treehugger
Bug: 155019925
Bug: 203734334
Change-Id: I323ed819e855ee240cfe524586c8e55f60c30282
16 files changed