Standardise safety comments in pvmfw and fdtpci.

Bug: 290018030
Test: m pvmfw_bin
Change-Id: Ia6aaf9e226d6594c6f97543857ce4f3b739dc699
diff --git a/pvmfw/src/fdt.rs b/pvmfw/src/fdt.rs
index 2382b50..4e41331 100644
--- a/pvmfw/src/fdt.rs
+++ b/pvmfw/src/fdt.rs
@@ -559,7 +559,7 @@
         *v = v.to_be();
     }
 
-    // SAFETY - array size is the same
+    // SAFETY: array size is the same
     let value = unsafe {
         core::mem::transmute::<
             [u32; NUM_INTERRUPTS * CELLS_PER_INTERRUPT],
@@ -801,7 +801,7 @@
         }
     };
 
-    // SAFETY - on failure, the corrupted DT is restored using the backup.
+    // SAFETY: on failure, the corrupted DT is restored using the backup.
     if let Err(e) = unsafe { fdt.apply_overlay(overlay) } {
         warn!("Failed to apply debug policy: {e}. Recovering...");
         fdt.copy_from_slice(backup_fdt.as_slice())?;