RISC-V: Add non-vector types to dfa pipelines

This patch adds non-vector related insn reservations and updates/creates
new insn reservations so all non-vector typed instructions have a reservation.

gcc/ChangeLog:

	* config/riscv/generic-ooo.md (generic_ooo_sfb_alu): Add reservation
	(generic_ooo_branch): ditto
	* config/riscv/generic.md (generic_sfb_alu): ditto
	(generic_fmul_half): ditto
	* config/riscv/riscv.md: Remove cbo, pushpop, and rdfrm types
	* config/riscv/sifive-7.md (sifive_7_hfma):Add reservation
	(sifive_7_popcount): ditto
	* config/riscv/vector.md: change rdfrm to fmove
	* config/riscv/zc.md: change pushpop to load/store

Signed-off-by: Edwin Lu <ewlu@rivosinc.com>