Merge "riscv64: stop explicitly disabling emutls." into main

cc/config/riscv64_device.go

@@ -25,7 +25,6 @@ var (
 	riscv64Cflags = []string{
 		// Help catch common 32/64-bit errors.
 		"-Werror=implicit-function-declaration",
-		"-fno-emulated-tls",
 		"-march=rv64gcv_zba_zbb_zbs",
 		// Equivalent to "-munaligned-access", but our clang doesn't have that yet.
 		"-Xclang -target-feature -Xclang +unaligned-scalar-mem",
@@ -44,7 +43,6 @@ var (
 
 	riscv64Lldflags = append(riscv64Ldflags,
 		"-Wl,-z,max-page-size=4096",
-		"-Wl,-plugin-opt,-emulated-tls=0",
 	)
 
 	riscv64Cppflags = []string{}