KVM: arm64: Remove obsolete kvm_virt_to_phys abstraction

This abstraction was introduced to hide the difference between arm and
arm64 but, with the former no longer supported, this abstraction can be
removed and the canonical kernel API used directly instead.

Signed-off-by: Andrew Scull <ascull@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
CC: Marc Zyngier <maz@kernel.org>
CC: James Morse <james.morse@arm.com>
CC: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20200519104036.259917-1-ascull@google.com

arch/arm64/include/asm/kvm_mmu.h

@@ -363,8 +363,6 @@ static inline void __kvm_flush_dcache_pud(pud_t pud)
 	}
 }
 
-#define kvm_virt_to_phys(x)		__pa_symbol(x)
-
 void kvm_set_way_flush(struct kvm_vcpu *vcpu);
 void kvm_toggle_cache(struct kvm_vcpu *vcpu, bool was_enabled);
 

arch/arm64/kvm/mmu.c

@@ -2197,11 +2197,11 @@ int kvm_mmu_init(void)
 {
 	int err;
 
-	hyp_idmap_start = kvm_virt_to_phys(__hyp_idmap_text_start);
+	hyp_idmap_start = __pa_symbol(__hyp_idmap_text_start);
 	hyp_idmap_start = ALIGN_DOWN(hyp_idmap_start, PAGE_SIZE);
-	hyp_idmap_end = kvm_virt_to_phys(__hyp_idmap_text_end);
+	hyp_idmap_end = __pa_symbol(__hyp_idmap_text_end);
 	hyp_idmap_end = ALIGN(hyp_idmap_end, PAGE_SIZE);
-	hyp_idmap_vector = kvm_virt_to_phys(__kvm_hyp_init);
+	hyp_idmap_vector = __pa_symbol(__kvm_hyp_init);
 
 	/*
 	 * We rely on the linker script to ensure at build time that the HYP