Fix remaining issues

Author: gnzlbg

crates/core_arch/src/lib.rs

@@ -32,6 +32,7 @@
     abi_unadjusted,
     adx_target_feature,
     rtm_target_feature,
+    f16c_target_feature,
     external_doc
 )]
 #![cfg_attr(test, feature(test, abi_vectorcall, untagged_unions))]

crates/core_arch/src/x86/rtm.rs

@@ -32,6 +32,7 @@ pub const _XBEGIN_STARTED: u32 = !0;
 
 /// Transaction explicitly aborted with xabort. The parameter passed to xabort is available with
 /// `_xabort_code(status)`.
+#[allow(clippy::identity_op)]
 pub const _XABORT_EXPLICIT: u32 = 1 << 0;
 
 /// Transaction retry is possible.