libc/sysdeps/linux/common/madvise.c: disable on noMMU architectures
libc/sysdeps/linux/common/madvise.c: disable on noMMU architectures

Similar to what was done in commit
9945c6d21797553e78cbef8034f6dd16b3824df5 for posix_madvise().

Signed-off-by: Thomas Petazzoni <a5d87d2bd7c424ee5cbdb4e978635bf653d5a005@free-electrons.com>

brgl/uclibc-ng,brgl/uclibc-ng,kraj/uclibc-ng,wbx-github/uclibc-ng,wbx-github/uclibc-ng,kraj/uclibc-ng,wbx-github/uclibc-ng,brgl/uclibc-ng,wbx-github/uclibc-ng,brgl/uclibc-ng,kraj/uclibc-ng,kraj/uclibc-ng