arch: Fix typo breaking use of core-avx2 arch

Signed-off-by: Esben Haabendal <esben@geanix.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

arch/Config.in.x86

@@ -236,7 +236,7 @@ config BR2_ARCH
 	default "i686"		if BR2_x86_core2 && BR2_i386
 	default "i686"		if BR2_x86_corei7 && BR2_i386
 	default "i686"		if BR2_x86_corei7_avx && BR2_i386
-	default "i686"		if BR2_x86_corei7_avx2 && BR2_i386
+	default "i686"		if BR2_x86_core_avx2 && BR2_i386
 	default "i686"		if BR2_x86_atom && BR2_i386
 	default "i686"		if BR2_x86_silvermont && BR2_i386
 	default "i686"		if BR2_x86_opteron && BR2_i386