[U-Boot] [RFC] Rearrange CONFIG_* macros

[york sun]

Guys,

I want to discuss to rearrange the current CONFIG_* macros used by 
Freescale Layerscape SoCs. We have been encouraged to use CONFIG_SYS_* 
macros to define hardware setting, and other CONFIG_* macros for user 
setting. Clearly this has changed. Kconfig options are used for most 
user settings from now on. I am OK with it. But for existing 
CONFIG_SYS_* macros, we need a plan to either move them out of CONFIG_* 
name space, or move some to Kconfig, if that makes sense. Since most our 
CONFIG_SYS_* macros are cross platforms (including armv7 and armv8), if 
using Kconfig option, do we add another mach-fsl folder to host the 
Kconfig, or somewhere else? We also have macros cross ARM and PowerPC. 
So we either move them out of arch/, or duplicate them for both arch.

If we move them to another name space, for example SYS_FSL_*, do we want 
to move them out of config.h?

Any suggestion/comment?

York