* config/tc-mips.c (mips_emit_delays): Replace magic constant for RA

	by the define. Remove superfluous check of mips_opts.mips16.
	(append_insn): Likewise. Canonicalize variable increments.
	(macro_build): Canonicalize variable increments.
	(macro_build_lui): Likewise.
	(load_register): Likewise.
	(load_address): Move pointer initialization.
	(macro): Move pointer to a more local scope. Canonicalize variable
	increments. Better comments. Replace magic constant for RA by the
	define.
	(macro2): Replace magic constant for RA by the define. Canonicalize
	variable increments.
	(mips_ip): Canonicalize variable increments.
	(mips16_ip): Replace magic constant for RA by the define.
	(my_getSmallParser): Canonicalize variable increments/decrements.
	(my_getPercentOp): Likewise.
	(my_getSmallExpression): Likewise.
	(s_align): Likewise.
	(s_mipsset): Likewise.
	(s_cpsetup): Likewise.
	(s_insn): Remove superfluous check of mips_opts.mips16.
	(s_mips_stab): Likewise.
	(mips_handle_align): Canonicalize variable increments.
	(s_mips_ent): Likewise.
	(s_mips_end): Add comment.