arm: [MVE intrinsics] factorize vmullbq vmulltq

arm: [MVE intrinsics] factorize vmullbq vmulltq

Factorize vmullbq, vmulltq so that they use the same parameterized
names.

2023-08-14  Christophe Lyon  <christophe.lyon@linaro.org>

	gcc/
	* config/arm/iterators.md (mve_insn): Add vmullb, vmullt.
	(isu): Add VMULLBQ_INT_S, VMULLBQ_INT_U, VMULLTQ_INT_S,
	VMULLTQ_INT_U.
	(supf): Add VMULLBQ_POLY_P, VMULLTQ_POLY_P, VMULLBQ_POLY_M_P,
	VMULLTQ_POLY_M_P.
	(VMULLBQ_INT, VMULLTQ_INT, VMULLBQ_INT_M, VMULLTQ_INT_M): Delete.
	(VMULLxQ_INT, VMULLxQ_POLY, VMULLxQ_INT_M, VMULLxQ_POLY_M): New.
	* config/arm/mve.md (mve_vmullbq_int_<supf><mode>)
	(mve_vmulltq_int_<supf><mode>): Merge into ...
	(@mve_<mve_insn>q_int_<supf><mode>) ... this.
	(mve_vmulltq_poly_p<mode>, mve_vmullbq_poly_p<mode>): Merge into ...
	(@mve_<mve_insn>q_poly_<supf><mode>): ... this.
	(mve_vmullbq_int_m_<supf><mode>, mve_vmulltq_int_m_<supf><mode>): Merge into ...
	(@mve_<mve_insn>q_int_m_<supf><mode>): ... this.
	(mve_vmullbq_poly_m_p<mode>, mve_vmulltq_poly_m_p<mode>): Merge into ...
	(@mve_<mve_insn>q_poly_m_<supf><mode>): ... this.