arm: [MVE intrinsics] rework vrndq vrndaq vrndmq vrndnq vrndpq vrndxq

Implement vrndq, vrndaq, vrndmq, vrndnq, vrndpq, vrndxq using the new
MVE builtins framework.

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

	gcc/
	* config/arm/arm-mve-builtins-base.cc (FUNCTION_ONLY_F): New.
	(vrndaq, vrndmq, vrndnq, vrndpq, vrndq, vrndxq): New.
	* config/arm/arm-mve-builtins-base.def (vrndaq, vrndmq, vrndnq)
	(vrndpq, vrndq, vrndxq): New.
	* config/arm/arm-mve-builtins-base.h (vrndaq, vrndmq, vrndnq)
	(vrndpq, vrndq, vrndxq): New.
	* config/arm/arm_mve.h (vrndxq): Remove.
	(vrndq): Remove.
	(vrndpq): Remove.
	(vrndnq): Remove.
	(vrndmq): Remove.
	(vrndaq): Remove.
	(vrndaq_m): Remove.
	(vrndmq_m): Remove.
	(vrndnq_m): Remove.
	(vrndpq_m): Remove.
	(vrndq_m): Remove.
	(vrndxq_m): Remove.
	(vrndq_x): Remove.
	(vrndnq_x): Remove.
	(vrndmq_x): Remove.
	(vrndpq_x): Remove.
	(vrndaq_x): Remove.
	(vrndxq_x): Remove.
	(vrndxq_f16): Remove.
	(vrndxq_f32): Remove.
	(vrndq_f16): Remove.
	(vrndq_f32): Remove.
	(vrndpq_f16): Remove.
	(vrndpq_f32): Remove.
	(vrndnq_f16): Remove.
	(vrndnq_f32): Remove.
	(vrndmq_f16): Remove.
	(vrndmq_f32): Remove.
	(vrndaq_f16): Remove.
	(vrndaq_f32): Remove.
	(vrndaq_m_f16): Remove.
	(vrndmq_m_f16): Remove.
	(vrndnq_m_f16): Remove.
	(vrndpq_m_f16): Remove.
	(vrndq_m_f16): Remove.
	(vrndxq_m_f16): Remove.
	(vrndaq_m_f32): Remove.
	(vrndmq_m_f32): Remove.
	(vrndnq_m_f32): Remove.
	(vrndpq_m_f32): Remove.
	(vrndq_m_f32): Remove.
	(vrndxq_m_f32): Remove.
	(vrndq_x_f16): Remove.
	(vrndq_x_f32): Remove.
	(vrndnq_x_f16): Remove.
	(vrndnq_x_f32): Remove.
	(vrndmq_x_f16): Remove.
	(vrndmq_x_f32): Remove.
	(vrndpq_x_f16): Remove.
	(vrndpq_x_f32): Remove.
	(vrndaq_x_f16): Remove.
	(vrndaq_x_f32): Remove.
	(vrndxq_x_f16): Remove.
	(vrndxq_x_f32): Remove.
	(__arm_vrndxq_f16): Remove.
	(__arm_vrndxq_f32): Remove.
	(__arm_vrndq_f16): Remove.
	(__arm_vrndq_f32): Remove.
	(__arm_vrndpq_f16): Remove.
	(__arm_vrndpq_f32): Remove.
	(__arm_vrndnq_f16): Remove.
	(__arm_vrndnq_f32): Remove.
	(__arm_vrndmq_f16): Remove.
	(__arm_vrndmq_f32): Remove.
	(__arm_vrndaq_f16): Remove.
	(__arm_vrndaq_f32): Remove.
	(__arm_vrndaq_m_f16): Remove.
	(__arm_vrndmq_m_f16): Remove.
	(__arm_vrndnq_m_f16): Remove.
	(__arm_vrndpq_m_f16): Remove.
	(__arm_vrndq_m_f16): Remove.
	(__arm_vrndxq_m_f16): Remove.
	(__arm_vrndaq_m_f32): Remove.
	(__arm_vrndmq_m_f32): Remove.
	(__arm_vrndnq_m_f32): Remove.
	(__arm_vrndpq_m_f32): Remove.
	(__arm_vrndq_m_f32): Remove.
	(__arm_vrndxq_m_f32): Remove.
	(__arm_vrndq_x_f16): Remove.
	(__arm_vrndq_x_f32): Remove.
	(__arm_vrndnq_x_f16): Remove.
	(__arm_vrndnq_x_f32): Remove.
	(__arm_vrndmq_x_f16): Remove.
	(__arm_vrndmq_x_f32): Remove.
	(__arm_vrndpq_x_f16): Remove.
	(__arm_vrndpq_x_f32): Remove.
	(__arm_vrndaq_x_f16): Remove.
	(__arm_vrndaq_x_f32): Remove.
	(__arm_vrndxq_x_f16): Remove.
	(__arm_vrndxq_x_f32): Remove.
	(__arm_vrndxq): Remove.
	(__arm_vrndq): Remove.
	(__arm_vrndpq): Remove.
	(__arm_vrndnq): Remove.
	(__arm_vrndmq): Remove.
	(__arm_vrndaq): Remove.
	(__arm_vrndaq_m): Remove.
	(__arm_vrndmq_m): Remove.
	(__arm_vrndnq_m): Remove.
	(__arm_vrndpq_m): Remove.
	(__arm_vrndq_m): Remove.
	(__arm_vrndxq_m): Remove.
	(__arm_vrndq_x): Remove.
	(__arm_vrndnq_x): Remove.
	(__arm_vrndmq_x): Remove.
	(__arm_vrndpq_x): Remove.
	(__arm_vrndaq_x): Remove.
	(__arm_vrndxq_x): Remove.