KVM: x86: Rename lapic get/set_reg64() helpers

In preparation for moving kvm-internal __kvm_lapic_set_reg64(),
__kvm_lapic_get_reg64() to apic.h for use in Secure AVIC APIC driver,
rename them as part of the APIC API.

No functional change intended.

Signed-off-by: Neeraj Upadhyay <Neeraj.Upadhyay@amd.com>
Acked-by: Sean Christopherson <seanjc@google.com>
Link: https://lore.kernel.org/r/20250709033242.267892-9-Neeraj.Upadhyay@amd.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

Author: neerajupadhya

arch/x86/kvm/lapic.c

@@ -89,18 +89,18 @@ static inline void kvm_lapic_set_reg(struct kvm_lapic *apic, int reg_off, u32 va
 	apic_set_reg(apic->regs, reg_off, val);
 }
 
-static __always_inline u64 __kvm_lapic_get_reg64(void *regs, int reg)
+static __always_inline u64 apic_get_reg64(void *regs, int reg)
 {
 	BUILD_BUG_ON(reg != APIC_ICR);
 	return *((u64 *) (regs + reg));
 }
 
 static __always_inline u64 kvm_lapic_get_reg64(struct kvm_lapic *apic, int reg)
 {
-	return __kvm_lapic_get_reg64(apic->regs, reg);
+	return apic_get_reg64(apic->regs, reg);
 }
 
-static __always_inline void __kvm_lapic_set_reg64(void *regs, int reg, u64 val)
+static __always_inline void apic_set_reg64(void *regs, int reg, u64 val)
 {
 	BUILD_BUG_ON(reg != APIC_ICR);
 	*((u64 *) (regs + reg)) = val;
@@ -109,7 +109,7 @@ static __always_inline void __kvm_lapic_set_reg64(void *regs, int reg, u64 val)
 static __always_inline void kvm_lapic_set_reg64(struct kvm_lapic *apic,
 						int reg, u64 val)
 {
-	__kvm_lapic_set_reg64(apic->regs, reg, val);
+	apic_set_reg64(apic->regs, reg, val);
 }
 
 static inline int apic_test_vector(int vec, void *bitmap)
@@ -3082,9 +3082,9 @@ static int kvm_apic_state_fixup(struct kvm_vcpu *vcpu,
 			if (set) {
 				icr = apic_get_reg(s->regs, APIC_ICR) |
 				      (u64)apic_get_reg(s->regs, APIC_ICR2) << 32;
-				__kvm_lapic_set_reg64(s->regs, APIC_ICR, icr);
+				apic_set_reg64(s->regs, APIC_ICR, icr);
 			} else {
-				icr = __kvm_lapic_get_reg64(s->regs, APIC_ICR);
+				icr = apic_get_reg64(s->regs, APIC_ICR);
 				apic_set_reg(s->regs, APIC_ICR2, icr >> 32);
 			}
 		}