mk: sort config templates listing
mk: sort config templates listing

The config templates can be seen with "make showconfigs", "make config" or
"make help". It's easier to read if it's sorted.

Signed-off-by: Thomas Monjalon <ee2fa8b2681c737f775687e475dcbf2028a412f1@6wind.com>
Acked-by: Olivier Matz <dfcc1510895413197abb4336e39bb0a3906cba71@6wind.com>

tsphillips/dpdk-fork,mixja/dpdk,john-mcnamara-intel/dpdk,venkynv/dpdk-mirror,john-mcnamara-intel/dpdk,mixja/dpdk,msune/dpdk,msune/dpdk,venkynv/dpdk-mirror,venkynv/dpdk-mirror,john-mcnamara-intel/dpdk,mixja/dpdk,tsphillips/dpdk-fork,venkynv/dpdk-mirror,msune/dpdk,tsphillips/dpdk-fork,mixja/dpdk,msune/dpdk,john-mcnamara-intel/dpdk,tsphillips/dpdk-fork