hw/arm/KConfig: Replace ZAURUS with ZAURUS_SCOOP

hw/arm/KConfig: Replace ZAURUS with ZAURUS_SCOOP

The ZAURUS KConfig symbol used to do multiple things:
 * pull in the tc6393xb display device
 * pull in the Zaurus SCOOP GPIO device
 * pull in hw/block/nand.c code
 * pull in hw/block/ecc.c code
and was used by multiple machine types in the Zaurus family.

Now that we've removed all the Zaurus machine types except
"collie" (which is not currently deprecated), we can simplify
this. "collie" doesn't need any of the above things except
for the SCOOP GPIO device.

Remove the does-lots-of-things ZAURUS KConfig symbol and instead have
collie pull in ZAURUS_SCOOP, a new KConfig symbol which exists only
to control the presence of the SCOOP GPIO device.  Move the
associated source file lines in MAINTAINERS into the Collie
subsection, since this is now its only user.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20240903160751.4100218-8-peter.maydell@linaro.org