arm: [MVE intrinsics] factorize vmlaldavaq vmlaldavaxq vmlsldavaq vmlsldavaxq

arm: [MVE intrinsics] factorize vmlaldavaq vmlaldavaxq vmlsldavaq vmlsldavaxq

Factorize vmlaldavaq, vmlaldavaxq, vmlsldavaq, vmlsldavaxq builtins so
that they use the same parameterized names.

2022-10-25  Christophe Lyon  <christophe.lyon@arm.com>

	gcc/
	* config/arm/iterators.md (MVE_VMLxLDAVAxQ, MVE_VMLxLDAVAxQ_P):
	New.
	(mve_insn): Add vmlaldava, vmlaldavax, vmlsldava, vmlsldavax.
	(supf): Add VMLALDAVAXQ_P_S, VMLALDAVAXQ_S, VMLSLDAVAQ_P_S,
	VMLSLDAVAQ_S, VMLSLDAVAXQ_P_S, VMLSLDAVAXQ_S.
	* config/arm/mve.md (mve_vmlaldavaq_<supf><mode>)
	(mve_vmlsldavaq_s<mode>, mve_vmlsldavaxq_s<mode>)
	(mve_vmlaldavaxq_s<mode>): Merge into ...
	(@mve_<mve_insn>q_<supf><mode>): ... this.
	(mve_vmlaldavaq_p_<supf><mode>, mve_vmlaldavaxq_p_<supf><mode>)
	(mve_vmlsldavaq_p_s<mode>, mve_vmlsldavaxq_p_s<mode>): Merge into
	...
	(@mve_<mve_insn>q_p_<supf><mode>): ... this.