kconfig: error out for recursive range

Currently, it is possible to create recursive ranges with Kconfig, such as:

config C
  int "Enable C"
  default 1
  range A B

config A
  int "Enable A"
  default 2
  range B C

config B
  int "Enable B"
  default 3
  range A C

The current outcome of this example above, is that all 3 options are set to 2.
There is currently no warning or error if a user attempts this.

Several attributes are already checked for recursion, including 'depends on',
'select', and 'imply', and we can extend this to 'range' for numeric options
(int and hex types).

Recursive ranges are currently not used anywhere in the tree, so it is already
safe to make this a hard error.

Assisted-by: Codex:gpt-5.6-sol
Signed-off-by: Julian Braha <julianbraha@gmail.com>
Link: https://patch.msgid.link/20260816215354.1499059-1-julianbraha@gmail.com
Signed-off-by: Nathan Chancellor <nathan@kernel.org>

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