fix: fix build with clang-18

Some uses of inline assembly for accessing floating point registers did
not enable the FP extension and were failing with clang-18.

The check in the linker script for the `hftest_enable` variable fails
under clang-18. However, hftest still compiles and passes without the
check, so it was removed.

Fix new warnings from `clang-tidy`.

Apply `make format`.

Change-Id: I43996abb4c42de54be807dcdb76107b9752c62fb
Signed-off-by: Karl Meakin <karl.meakin@arm.com>
diff --git a/inc/hf/list.h b/inc/hf/list.h
index 0f200ce..1f13697 100644
--- a/inc/hf/list.h
+++ b/inc/hf/list.h
@@ -16,10 +16,7 @@
 	struct list_entry *prev;
 };
 
-#define LIST_INIT(l)                   \
-	{                              \
-		.next = &l, .prev = &l \
-	}
+#define LIST_INIT(l) {.next = &l, .prev = &l}
 #define CONTAINER_OF(ptr, type, field) \
 	((type *)((char *)ptr - offsetof(type, field)))