arm: [MVE intrinsics] factorize vcvtaq vcvtmq vcvtnq vcvtpq

arm: [MVE intrinsics] factorize vcvtaq vcvtmq vcvtnq vcvtpq

Factorize vcvtaq vcvtmq vcvtnq vcvtpq builtins so that they use the
same parameterized names.

2024-07-11  Christophe Lyon  <christophe.lyon@linaro.org>

	gcc/
	* config/arm/iterators.md (mve_insn): Add VCVTAQ_M_S, VCVTAQ_M_U,
	VCVTAQ_S, VCVTAQ_U, VCVTMQ_M_S, VCVTMQ_M_U, VCVTMQ_S, VCVTMQ_U,
	VCVTNQ_M_S, VCVTNQ_M_U, VCVTNQ_S, VCVTNQ_U, VCVTPQ_M_S,
	VCVTPQ_M_U, VCVTPQ_S, VCVTPQ_U.
	(VCVTAQ, VCVTPQ, VCVTNQ, VCVTMQ, VCVTAQ_M, VCVTMQ_M, VCVTNQ_M)
	(VCVTPQ_M): Delete.
	(VCVTxQ, VCVTxQ_M): New.
	* config/arm/mve.md (mve_vcvtpq_<supf><mode>)
	(mve_vcvtnq_<supf><mode>, mve_vcvtmq_<supf><mode>)
	(mve_vcvtaq_<supf><mode>): Merge into ...
	(@mve_<mve_insn>q_<supf><mode>): ... this.
	(mve_vcvtaq_m_<supf><mode>, mve_vcvtmq_m_<supf><mode>)
	(mve_vcvtpq_m_<supf><mode>, mve_vcvtnq_m_<supf><mode>): Merge into
	...
	(@mve_<mve_insn>q_m_<supf><mode>): ... this.