Hi Greg and Sasha,
Please apply commit 28187dc8ebd9 ("ARM: 9025/1: Kconfig: CPU_BIG_ENDIAN depends on !LD_IS_LLD") to linux-5.10.y, as it fixes a series of errors that are seen with ARCH=arm LLVM=1 all{mod,yes}config. CONFIG_LD_IS_LLD was introduced in 5.8 so it currently does not need to go back farther than 5.10.
Cheers, Nathan