package/kodi: add support for more architectures

For the autoconf-based build system it was necessary to allow each
supported architecture separatly:
https://github.com/xbmc/xbmc/blob/Krypton/m4/xbmc_arch.m4



For the CMake build system this is not necessary anymore so we only
blacklist archs in Config.in known to be broken.

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
[Thomas: slightly tweak the BR2_PACKAGE_KODI_ARCH_SUPPORTS definition.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>