Change -mtune=ia to -mtune=intel

	* config.gcc: Change --with-cpu=ia to --with-cpu=intel.

	* config/i386/i386.c (cpu_names): Replace "ia" with "intel".
	(processor_alias_table): Likewise.
	(ix86_option_override_internal): Likewise.
	* config/i386/i386.h (target_cpu_default): Replace
	TARGET_CPU_DEFAULT_ia with TARGET_CPU_DEFAULT_intel.

	* doc/invoke.texi: Replace -mtune=ia with -mtune=intel.

From-SVN: r205754