x86: Move common Intel CPU info code into a function

Add cpu_intel_get_info() to find out the CPU info on modern Intel CPUs.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
[bmeng: add parameter and return value descriptions]
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
4 files changed