package/nxp-mwifiex: fix build failure on s390x
s390x doesn't support Wi-Fi on Linux. See [1]. So let's disable the
package for this architecture.
Fixes: https://autobuild.buildroot.org/results/44aef9d74857d93d90cefb1d59110e857ff4dfaf
[1] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=f54bfc0e34dbd15e9df099a8e36a346c6c583f3c
Signed-off-by: Sébastien Szymanski <sebastien.szymanski@armadeus.com>
[Julien: add link to kernel commit hiding wireless for s390]
Signed-off-by: Julien Olivain <ju.o@free.fr>
Sébastien Szymanski