Move boards to the tiny subtarget which break the build if the kernel is
set to "Optimize for performance".
Signed-off-by: Mathias Kresin <dev@kresin.me>
This new subtarget sets the small_flash flag and removes unused kernel
configuration.
small_flash removes KERNEL_KALLSYMS, which saves ~107KB in the default
configuration; removing unneeded hardware support from ar71xx/tiny saves
another ~18KB (both after LZMA).
Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>