arm: [MVE intrinsics] factorize vmaxnmaq vminnmaq

Factorize vmaxnmaq and vminnmaq so that they use the same pattern.

2022-09-08  Christophe Lyon <christophe.lyon@arm.com>

	gcc/
	* config/arm/iterators.md (MVE_VMAXNMA_VMINNMAQ)
	(MVE_VMAXNMA_VMINNMAQ_M): New.
	(mve_insn): Add vmaxnma, vminnma.
	* config/arm/mve.md (mve_vmaxnmaq_f<mode>, mve_vminnmaq_f<mode>):
	Merge into ...
	(@mve_<mve_insn>q_f<mode>): ... this.
	(mve_vmaxnmaq_m_f<mode>, mve_vminnmaq_m_f<mode>): Merge into ...
	(@mve_<mve_insn>q_m_f<mode>): ... this.