arm64: KVM: Kill hyp_alternate_select()

#define read_sysreg_el2(r)	read_sysreg_elx(r, _EL2, _EL1)

#define write_sysreg_el2(v,r)	write_sysreg_elx(v, r, _EL2, _EL1)

/**

 * hyp_alternate_select - Generates patchable code sequences that are

 * used to switch between two implementations of a function, depending

 * on the availability of a feature.

 *

 * @fname: a symbol name that will be defined as a function returning a

 * function pointer whose type will match @orig and @alt

 * @orig: A pointer to the default function, as returned by @fname when

 * @cond doesn't hold

 * @alt: A pointer to the alternate function, as returned by @fname

 * when @cond holds

 * @cond: a CPU feature (as described in asm/cpufeature.h)

 */

#define hyp_alternate_select(fname, orig, alt, cond)			\

typeof(orig) * __hyp_text fname(void)					\

{									\

	typeof(alt) *val = orig;					\

	asm volatile(ALTERNATIVE("nop		\n",			\

				 "mov	%0, %1	\n",			\

				 cond)					\

		     : "+r" (val) : "r" (alt));				\

	return val;							\

}

int __vgic_v2_perform_cpuif_access(struct kvm_vcpu *vcpu);

void __vgic_v3_save_state(struct kvm_vcpu *vcpu);