aarch64: Move cycle estimation into aarch64_vec_op_count

aarch64: Move cycle estimation into aarch64_vec_op_count

This patch just moves the main cycle estimation routines
into aarch64_vec_op_count.

gcc/
	* config/aarch64/aarch64.c
	(aarch64_vec_op_count::rename_cycles_per_iter): New function.
	(aarch64_vec_op_count::min_nonpred_cycles_per_iter): Likewise.
	(aarch64_vec_op_count::min_pred_cycles_per_iter): Likewise.
	(aarch64_vec_op_count::min_cycles_per_iter): Likewise.
	(aarch64_vec_op_count::dump): Move earlier in file.  Dump the
	above properties too.
	(aarch64_estimate_min_cycles_per_iter): Delete.
	(adjust_body_cost): Use aarch64_vec_op_count::min_cycles_per_iter
	instead of aarch64_estimate_min_cycles_per_iter.  Rely on the dump
	routine to print CPI estimates.
	(adjust_body_cost_sve): Likewise.  Use the other functions above
	instead of doing the work inline.