gecko: doc: Update the copyright line in Licence | Update to GSDK 4.4.0

Update the copyright line in files to latest version as per gecko_sdk 4.4.0
Correction in location of se_manager in gecko/README

Signed-off-by: Sateesh Kotapati <sateesh.kotapati@silabs.com>
diff --git a/west.yml b/west.yml
index 92dcff0..065c2b6 100644
--- a/west.yml
+++ b/west.yml
@@ -219,7 +219,7 @@
       groups:
         - hal
     - name: hal_silabs
-      revision: 20024164aa2a79c186aedc721cf51d667eecb35a
+      revision: b11b29167f3f9a0fd0c34a8eeeb36b0c1d218917
       path: modules/hal/silabs
       groups:
         - hal