backports: Build CONFIG_MT7603E only for kernel >= 4.2

The mt76 core driver makes use of struct page_frag_cache which was only
added with kernel 4.2, deactivate all modules of the mt76 driver on
older kernel versions. CONFIG_MT7603E was newly added in this kernel
version.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
1 file changed