Update cfg gates with Armv8-M

Update cfg attributes and code documentation to take into consideration
the new Armv8-M architecture profiles.

Signed-off-by: Hugues de Valon <hugues.devalon@arm.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 276551c..aedb95a 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -62,7 +62,7 @@ pub mod asm;
 #[cfg(armv8m)]
 pub mod cmse;
 pub mod interrupt;
-#[cfg(not(armv6m))]
+#[cfg(all(not(armv6m), not(armv8m_base)))]
 pub mod itm;
 pub mod peripheral;
 pub mod register;