libutils: add division routines from LLVM compiler-rt

Add division routines needed to provide __udivti3() needed for long long
divisions in mbedtls.

Selected files are imported from the compiler-rt

libutils: add division routines from LLVM compiler-rt

Add division routines needed to provide __udivti3() needed for long long
divisions in mbedtls.

Selected files are imported from the compiler-rt directory in LLVM
version 20.1.3, tag llvmorg-20.1, to lib/libutils/compiler-rt with no
local changes except for the added sub.mk files.

Link: https://github.com/OP-TEE/optee_os/pull/7359
Link: https://github.com/OP-TEE/optee_os/issues/7374
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org>

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