Standardise safety comments in pvmfw and fdtpci.

Bug: 290018030
Test: m pvmfw_bin
Change-Id: Ia6aaf9e226d6594c6f97543857ce4f3b739dc699
diff --git a/pvmfw/src/gpt.rs b/pvmfw/src/gpt.rs
index 892850c..1060460 100644
--- a/pvmfw/src/gpt.rs
+++ b/pvmfw/src/gpt.rs
@@ -130,7 +130,7 @@
         for i in Header::ENTRIES_LBA..Header::ENTRIES_LBA.checked_add(num_blocks).unwrap() {
             self.read_block(i, &mut blk)?;
             let entries = blk.as_ptr().cast::<Entry>();
-            // SAFETY - blk is assumed to be properly aligned for Entry and its size is assert-ed
+            // SAFETY: blk is assumed to be properly aligned for Entry and its size is assert-ed
             // above. All potential values of the slice will produce valid Entry values.
             let entries = unsafe { slice::from_raw_parts(entries, min(rem, entries_per_blk)) };
             for entry in entries {