arm: [MVE intrinsics] rework vshlcq

arm: [MVE intrinsics] rework vshlcq

Implement vshlc using the new MVE builtins framework.

2024-08-28  Christophe Lyon  <christophe.lyon@linaro.org>

	gcc/
	* config/arm/arm-mve-builtins-base.cc (class vshlc_impl): New.
	(vshlc): New.
	* config/arm/arm-mve-builtins-base.def (vshlcq): New.
	* config/arm/arm-mve-builtins-base.h (vshlcq): New.
	* config/arm/arm-mve-builtins.cc
	(function_instance::has_inactive_argument): Handle vshlc.
	* config/arm/arm_mve.h (vshlcq): Delete.
	(vshlcq_m): Delete.
	(vshlcq_s8): Delete.
	(vshlcq_u8): Delete.
	(vshlcq_s16): Delete.
	(vshlcq_u16): Delete.
	(vshlcq_s32): Delete.
	(vshlcq_u32): Delete.
	(vshlcq_m_s8): Delete.
	(vshlcq_m_u8): Delete.
	(vshlcq_m_s16): Delete.
	(vshlcq_m_u16): Delete.
	(vshlcq_m_s32): Delete.
	(vshlcq_m_u32): Delete.
	(__arm_vshlcq_s8): Delete.
	(__arm_vshlcq_u8): Delete.
	(__arm_vshlcq_s16): Delete.
	(__arm_vshlcq_u16): Delete.
	(__arm_vshlcq_s32): Delete.
	(__arm_vshlcq_u32): Delete.
	(__arm_vshlcq_m_s8): Delete.
	(__arm_vshlcq_m_u8): Delete.
	(__arm_vshlcq_m_s16): Delete.
	(__arm_vshlcq_m_u16): Delete.
	(__arm_vshlcq_m_s32): Delete.
	(__arm_vshlcq_m_u32): Delete.
	(__arm_vshlcq): Delete.
	(__arm_vshlcq_m): Delete.
	* config/arm/mve.md (mve_vshlcq_<supf><mode>): Add '@' prefix.
	(mve_vshlcq_m_<supf><mode>): Likewise.