KVM: arm64: removed unused kern_hyp_va asm macro

The last usage of this macro was removed in:
commit 5dc33bd199ca ("KVM: arm64: nVHE: Pass pointers consistently to hyp-init")

Signed-off-by: Joey Gouly <[e-mail]>
Cc: Marc Zyngier <[e-mail]>
Cc: Oliver Upton <[e-mail]>
Acked-by: Marc Zyngier <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Oliver Upton <[e-mail]>

arch/arm64/include/asm/kvm_mmu.h

···
 #include <asm/alternative.h>
 
 /*
- * Convert a kernel VA into a HYP VA.
- * reg: VA to be converted.
- */
-.macro kern_hyp_va	reg
-#ifndef __KVM_VHE_HYPERVISOR__
-alternative_cb ARM64_ALWAYS_SYSTEM, kvm_update_va_mask
-	and     \reg, \reg, #1		/* mask with va_mask */
-	ror	\reg, \reg, #1		/* rotate to the first tag bit */
-	add	\reg, \reg, #0		/* insert the low 12 bits of the tag */
-	add	\reg, \reg, #0, lsl 12	/* insert the top 12 bits of the tag */
-	ror	\reg, \reg, #63		/* rotate back */
-alternative_cb_end
-#endif
-.endm
-
-/*
  * Convert a hypervisor VA to a PA
  * reg: hypervisor address to be converted in place
  * tmp: temporary register