target/riscv KVM_RISCV_SET_TIMER macro is not configured correctly
Description of problem:
When riscv kvm vm state changed, guest virtual time would stop/continue. But KVM_RISCV_SET_TIMER is wrong, qemu-kvm can only set 'time'.
Steps to reproduce:
1.start host kernel
2.start qemu-kvm
Additional information:
Below code has some probelm:
```
===================================================================
#define KVM_RISCV_SET_TIMER(cs, env, name, reg) \
    do { \
        int ret = kvm_set_one_reg(cs, RISCV_TIMER_REG(env, time), &reg); \

===================================================================
```
I think it should be like this:

```
diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
index 30f21453d6..0c567f668c 100644
--- a/target/riscv/kvm.c
+++ b/target/riscv/kvm.c
@@ -99,7 +99,7 @@ static uint64_t kvm_riscv_reg_id(CPURISCVState *env, uint64_t type,

 #define KVM_RISCV_SET_TIMER(cs, env, name, reg) \
     do { \
-        int ret = kvm_set_one_reg(cs, RISCV_TIMER_REG(env, time), &reg); \
+        int ret = kvm_set_one_reg(cs, RISCV_TIMER_REG(env, name), &reg); \
         if (ret) { \
             abort(); \
         } \
```