configure: add support for new CPUs

Add new -march values for Intel and AMD CPUs introduced with GCC 5 and 6, and
improve SunCC flags accordingly.
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: James Almer <jamrial@gmail.com>

configure

@@ -3801,11 +3801,11 @@ suncc_flags(){
                     westmere)                  echo -xtarget=westmere    ;;
                     silvermont)                echo -xarch=sse4_2        ;;
                     corei7-avx|sandybridge)    echo -xtarget=sandybridge ;;
-                    core-avx*|ivybridge|haswell|broadwell)
+                    core-avx*|ivybridge|haswell|broadwell|skylake*|knl)
                                                echo -xarch=avx           ;;
                     amdfam10|barcelona)        echo -xtarget=barcelona   ;;
                     btver1)                    echo -xarch=amdsse4a      ;;
-                    btver2|bdver*)             echo -xarch=avx           ;;
+                    btver2|bdver*|znver*)      echo -xarch=avx           ;;
                     athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
                     k8|opteron|athlon64|athlon-fx)
                                                echo -xarch=sse2a         ;;
@@ -4501,7 +4501,8 @@ elif enabled x86; then
         ;;
         # targets that do support nopl and conditional mov (cmov)
         i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx\
-        |core*|atom|bonnell|nehalem|westmere|silvermont|sandybridge|ivybridge|haswell|broadwell|amdfam10|barcelona|b[dt]ver*)
+        |core*|atom|bonnell|nehalem|westmere|silvermont|sandybridge|ivybridge|haswell|broadwell|skylake*|knl\
+        |amdfam10|barcelona|b[dt]ver*|znver*)
             cpuflags="-march=$cpu"
             enable i686
             enable fast_cmov