[U-Boot] Exynos 5800/5422 CPU ID inconsistency.

[Przemyslaw Marczak <p.marczak@samsung.com>]

Hello,

The s5p_cpu_id variable is set in here:
arch/arm/mach-exynos/include/mach/cpu.h

For value 0x422, found in pro id register, the s5p_cpu_id is set as 
0x5800. I think, that hiding the real info is wrong and misleading.

I don't have documentation for E5800, but maybe there is some additional 
register like package id to recognise the SoC variant.

I'm pointing this issue, because for older boards, we used this 
information to set the $fdtfile environment variable name, to next load 
proper fdt from partition before boot the kernel.

Now, I would like use the s5p_cpu_id to set the fdtfile name for Odroid 
XU3/4, but the value is bad.

I would like fix this value to the real one, but then, the CPU name will 
change on Chromebooks.

To fix this we could add "cpu-name" property to device tree, and then 
print it.

What do you think about this?

Best regards,
-- 
Przemyslaw Marczak
Samsung R&D Institute Poland
Samsung Electronics
p.marczak at samsung.com