[clang][driver][NFC] Remove else after return (#131182)

Author: ilovepi

clang/lib/Driver/ToolChains/Arch/RISCV.cpp

@@ -318,11 +318,11 @@ std::string riscv::getRISCVArch(const llvm::opt::ArgList &Args,
 
     if (MABI.equals_insensitive("ilp32e"))
       return "rv32e";
-    else if (MABI.equals_insensitive("lp64e"))
+    if (MABI.equals_insensitive("lp64e"))
       return "rv64e";
-    else if (MABI.starts_with_insensitive("ilp32"))
+    if (MABI.starts_with_insensitive("ilp32"))
       return "rv32imafdc";
-    else if (MABI.starts_with_insensitive("lp64")) {
+    if (MABI.starts_with_insensitive("lp64")) {
       if (Triple.isAndroid())
         return "rv64imafdcv_zba_zbb_zbs";
 
@@ -338,16 +338,14 @@ std::string riscv::getRISCVArch(const llvm::opt::ArgList &Args,
   if (Triple.isRISCV32()) {
     if (Triple.getOS() == llvm::Triple::UnknownOS)
       return "rv32imac";
-    else
-      return "rv32imafdc";
-  } else {
-    if (Triple.getOS() == llvm::Triple::UnknownOS)
-      return "rv64imac";
-    else if (Triple.isAndroid())
-      return "rv64imafdcv_zba_zbb_zbs";
-    else
-      return "rv64imafdc";
+    return "rv32imafdc";
   }
+
+  if (Triple.getOS() == llvm::Triple::UnknownOS)
+    return "rv64imac";
+  if (Triple.isAndroid())
+    return "rv64imafdcv_zba_zbb_zbs";
+  return "rv64imafdc";
 }
 
 std::string riscv::getRISCVTargetCPU(const llvm::opt::ArgList &Args,