configure: Revert commit 5176e965

This fixes cpunop detection and unbreaks NASM assembly
Signed-off-by: Dave Yeo <daveryeo@telus.net>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

configure

@@ -1455,7 +1455,6 @@ ARCH_EXT_LIST_X86='
     amd3dnowext
     avx
     avx2
-    cpunop
     fma3
     fma4
     i686
@@ -1551,6 +1550,7 @@ HAVE_LIST="
     clock_gettime
     closesocket
     CommandLineToArgvW
+    cpunop
     CryptGenRandom
     dcbzl
     dev_bktr_ioctl_bt848_h