feat: more RISC-V features

These features include:
- V for vector extension
- Zfinx, Zdinx, Zhinx and Zhinxmin float in integer register extensions
- Zfh, Zfhmin 16-bit float pointer extensions
- Zbkb, Zkbc, Zbkc, Zk* cryptography extensions

It matches name in LLVM feature and is_riscv_feature_detected!.

Author: luojia65

compiler/rustc_codegen_ssa/src/target_features.rs

@@ -223,6 +223,26 @@ const RISCV_ALLOWED_FEATURES: &[(&str, Option<Symbol>)] = &[
     ("f", Some(sym::riscv_target_feature)),
     ("d", Some(sym::riscv_target_feature)),
     ("e", Some(sym::riscv_target_feature)),
+    ("v", Some(sym::riscv_target_feature)),
+    ("zfinx", Some(sym::riscv_target_feature)),
+    ("zdinx", Some(sym::riscv_target_feature)),
+    ("zhinx", Some(sym::riscv_target_feature)),
+    ("zhinxmin", Some(sym::riscv_target_feature)),
+    ("zfh", Some(sym::riscv_target_feature)),
+    ("zfhmin", Some(sym::riscv_target_feature)),
+    ("zbkb", Some(sym::riscv_target_feature)),
+    ("zbkc", Some(sym::riscv_target_feature)),
+    ("zbkx", Some(sym::riscv_target_feature)),
+    ("zknd", Some(sym::riscv_target_feature)),
+    ("zkne", Some(sym::riscv_target_feature)),
+    ("zknh", Some(sym::riscv_target_feature)),
+    ("zksed", Some(sym::riscv_target_feature)),
+    ("zksh", Some(sym::riscv_target_feature)),
+    ("zkr", Some(sym::riscv_target_feature)),
+    ("zkn", Some(sym::riscv_target_feature)),
+    ("zks", Some(sym::riscv_target_feature)),
+    ("zk", Some(sym::riscv_target_feature)),
+    ("zkt", Some(sym::riscv_target_feature)),
 ];
 
 const WASM_ALLOWED_FEATURES: &[(&str, Option<Symbol>)] = &[