sh: Remove unused SH4-202 support

This early prototype of the SH4 CPU was only used in the "microdev" board
that is now removed, so all of the SH4-202 supoprt can also be removed.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Link: https://lore.kernel.org/r/20230914155523.3839811-2-arnd@kernel.org


Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>