KVM: arm64: guest: fix kernel-doc warnings

Fix multiple function parameter descriptions to prevent warnings:

guest.c:718: warning: Function parameter or struct member 'vcpu' not described in 'kvm_arm_num_regs'
guest.c:736: warning: Function parameter or struct member 'vcpu' not described in 'kvm_arm_copy_reg_indices'
guest.c:736: warning: Function parameter or struct member 'uindices' not described in 'kvm_arm_copy_reg_indices'
arch/arm64/kvm/guest.c:915: warning: Excess function parameter 'kvm' description in 'kvm_arch_vcpu_ioctl_set_guest_debug'
arch/arm64/kvm/guest.c:915: warning: Excess function parameter 'kvm_guest_debug' description in 'kvm_arch_vcpu_ioctl_set_guest_debug'

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Oliver Upton <oliver.upton@linux.dev>
Cc: James Morse <james.morse@arm.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Zenghui Yu <yuzenghui@huawei.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: kvmarm@lists.linux.dev
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Reviewed-by: Zenghui Yu <yuzenghui@huawei.com>
Link: https://lore.kernel.org/r/20240117230714.31025-3-rdunlap@infradead.org
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>

Author: rddunlap

arch/arm64/kvm/guest.c

@@ -711,6 +711,7 @@ static int copy_sve_reg_indices(const struct kvm_vcpu *vcpu,
 
 /**
  * kvm_arm_num_regs - how many registers do we present via KVM_GET_ONE_REG
+ * @vcpu: the vCPU pointer
  *
  * This is for all registers.
  */
@@ -729,6 +730,8 @@ unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu)
 
 /**
  * kvm_arm_copy_reg_indices - get indices of all registers.
+ * @vcpu: the vCPU pointer
+ * @uindices: register list to copy
  *
  * We do core registers right here, then we append system regs.
  */
@@ -902,8 +905,8 @@ int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 
 /**
  * kvm_arch_vcpu_ioctl_set_guest_debug - set up guest debugging
- * @kvm:	pointer to the KVM struct
- * @kvm_guest_debug: the ioctl data buffer
+ * @vcpu: the vCPU pointer
+ * @dbg: the ioctl data buffer
  *
  * This sets up and enables the VM for guest debugging. Userspace
  * passes in a control flag to enable different debug types and