This patch adds `car_lib.c` to the IA common code to consolidate
SoC-agnostic CAR APIs. Initially, it includes `car_report_cache_info()`
to provide a unified way to read cache information, reducing the need
for SoC-specific implementations.
TEST=Builds successfully for google/rex.
Change-Id: I2ff84b27736057d19d4ec68c9afcb9b22e778f55
Signed-off-by: Subrata Banik <subratabanik@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/83480
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <ericllai@google.com>
4c5c685882