[PATCH] i386: Fix usage of -mtune when X86_GENERIC=y or CONFIG_MCORE2=y

Two fixes to arch/i386/Makefile.cpu: 1) When X86_GENERIC=y is set, use -mtune=i686 if $(CC) doesn't support -mtune=generic. GCC 4.1.2 and earlier don't support -mtune=generic. When building a generic kernel for a distro that runs on i586 and better, it is nice to use -march=i586

[PATCH] i386: Fix usage of -mtune when X86_GENERIC=y or CONFIG_MCORE2=y

Two fixes to arch/i386/Makefile.cpu: 1) When X86_GENERIC=y is set, use -mtune=i686 if $(CC) doesn't support -mtune=generic. GCC 4.1.2 and earlier don't support -mtune=generic. When building a generic kernel for a distro that runs on i586 and better, it is nice to use -march=i586