riscv: kvm: vcpu_timer: fix unused variable warnings

In two places, csr is set but never used:

arch/riscv/kvm/vcpu_timer.c:302:23: warning: variable 'csr' set but not used [-Wunused-but-set-variable]
        struct kvm_vcpu_csr *csr;
                             ^
arch/riscv/kvm/vcpu_timer.c:327:23: warning: variable 'csr' set but not used [-Wunused-but-set-variable]
        struct kvm_vcpu_csr *csr;
                             ^

Remove the variable.

Fixes: 8f5cb44 ("RISC-V: KVM: Support sstc extension")
Reviewed-by: Palmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Anup Patel <anup@brainfault.org>

arch/riscv/kvm/vcpu_timer.c

@@ -299,15 +299,13 @@ static void kvm_riscv_vcpu_update_timedelta(struct kvm_vcpu *vcpu)
 
 void kvm_riscv_vcpu_timer_restore(struct kvm_vcpu *vcpu)
 {
-	struct kvm_vcpu_csr *csr;
 	struct kvm_vcpu_timer *t = &vcpu->arch.timer;
 
 	kvm_riscv_vcpu_update_timedelta(vcpu);
 
 	if (!t->sstc_enabled)
 		return;
 
-	csr = &vcpu->arch.guest_csr;
 #if defined(CONFIG_32BIT)
 	csr_write(CSR_VSTIMECMP, (u32)t->next_cycles);
 	csr_write(CSR_VSTIMECMPH, (u32)(t->next_cycles >> 32));
@@ -324,13 +322,11 @@ void kvm_riscv_vcpu_timer_restore(struct kvm_vcpu *vcpu)
 
 void kvm_riscv_vcpu_timer_save(struct kvm_vcpu *vcpu)
 {
-	struct kvm_vcpu_csr *csr;
 	struct kvm_vcpu_timer *t = &vcpu->arch.timer;
 
 	if (!t->sstc_enabled)
 		return;
 
-	csr = &vcpu->arch.guest_csr;
 	t = &vcpu->arch.timer;
 #if defined(CONFIG_32BIT)
 	t->next_cycles = csr_read(CSR_VSTIMECMP);