* doc/as.texinfo (Target ARC options): Remove -marc4, -marc5,
	-marc8 -mEB and -mEL. Add -mcpu, -mA6, -mARC600, -mARC601, -mA7,
	-mARC700, -mEM, -mARCv2EM, -mav2em, -mld-extension-reg-mask,
	-muser-mode-only, -mbarrel-shifter, -mdpfp, -mdpfp-compact,
	-mdpfp-fast, -mdsp-packa, -mdvbf, -mea, -mlock, -mmac-24,
	-mmac-d16, -mmin-max, -mmul64, -mno-mpy, -mnorm, -mrtsc, -msimd,
	-mspfp, -mspfp-compact, -mspfp-fast, -mswap, -mswape, -mtelephony
	and -mxy.
	* doc/c-arc.texi (ARC Dependent Features): Add descriptions of
	-mbarrel-shifter, -mcpu, -mA6, -mARC600, -mARC601, -mA7, -mARC700,
	-mEM, -mARCv2EM, -mav2em, -mld-extension-reg-mask,
	-muser-mode-only, -mdpfp -mdpfp-compact, -mdpfp-fast, -mdsp-packa,
	-mdvbf, -mea, -mmac-24, -mmac-d16, -mmin-max, -mmul64, -mno-mpy,
	-mnorm, -msimd, -mspfp, -mspfp-compact, -mspfp-fast, -mswap,
	-mtelephony and -mxy options.  Mark -EB, -EL, -mbarrel_shifter,
	-mdpfp_compact, -mdpfp_fast, -mdsp_packa, -mEA, -mmac_24,
	-mmac_d16, -mmin_max, -mspfp_compact and -mspfp_fast options as
	deprecated. Remove -mA4 and -mA5 options. Add description of '%',
	'@' and '-' syntax. Add description for 'Register Names'
	section. Add description of FPX extension for Floating Point.
	Provide definitions of .2byte, .3byte, .4byte, .half and .long
	directives. Remove .extCoreRegister, .extAuxRegister, .extCondCode
	.extCoreRegister, .extInstruction, .arc5 and .arc8 directives