ozone: keep the sidebar and header draw phases out of line

Same treatment as rgui_render, and for the same reason: ozone_frame()
is factored into named phases, but the single-call-site ones are
inlined back into it at -O3, so branches that are not taken on a given
frame still occupy the fall-through path in L1i.

  ozone_frame      .text   19855 -> 17018   (-14%)
                   spills    641 ->   674

  broken out       ozone_draw_sidebar   6976
                   ozone_draw_header    3170

Total .text for the TU goes down as well, 104723 -> 104515.

Only these two are annotated.  The set was chosen by measuring each
phase individually rather than annotating all of them, because the
effect is not monotonic -- outlining one phase changes the inliner's
budget for the others.  Outlining ozone_draw_thumbnail_bar makes
ozone_frame *larger* (20191, +336) and costs 736 bytes of TU size, and
ozone_draw_backdrop is only worth 128 bytes.  Both are left inline.

Note the spill count for ozone_frame itself goes slightly up.  That is
the usual accounting artefact of moving code across a call boundary and
is not a regression in memory traffic; the win here is the I-cache
footprint of the fall-through path.

menu/drivers/ozone.c

@@ -60,6 +60,26 @@
 #include "../../cheevos/cheevos_menu.h"
 #endif
 
+/* Force a render phase out of line even though it has a single call
+ * site.  Follows the RXML_NOINLINE precedent in
+ * libretro-common/formats/xml/rxml.c.
+ *
+ * ozone_frame() is already factored into named phases, but at -O3 the
+ * ones called exactly once are inlined straight back into it, so
+ * branches that are not taken on a given frame still occupy the
+ * fall-through path in L1i.  Under -Os the compiler already optimises
+ * for size and the forced outlining only adds call overhead, so it is
+ * disabled there. */
+#if defined(__OPTIMIZE_SIZE__)
+#define OZONE_NOINLINE
+#elif defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))
+#define OZONE_NOINLINE __attribute__((noinline))
+#elif defined(_MSC_VER)
+#define OZONE_NOINLINE __declspec(noinline)
+#else
+#define OZONE_NOINLINE
+#endif
+
 #define ANIMATION_PUSH_ENTRY_DURATION (166.66667f)
 #define ANIMATION_CURSOR_DURATION     (ANIMATION_PUSH_ENTRY_DURATION)
 #define ANIMATION_CURSOR_PULSE        (ANIMATION_PUSH_ENTRY_DURATION * 3)
@@ -3407,7 +3427,7 @@ static INLINE void ozone_text_color_hp(uint32_t rgba, float alpha,
    out[3] = alpha < 0.0f ? 0.0f : (alpha > 1.0f ? 1.0f : alpha);
 }
 
-static void ozone_draw_sidebar(
+OZONE_NOINLINE static void ozone_draw_sidebar(
       ozone_handle_t *ozone,
       const uintptr_t *icons_tex,
       const uintptr_t *tab_tex,
@@ -11020,7 +11040,7 @@ static void ozone_render(void *data,
    GFX_ANIMATION_CLEAR_ACTIVE(p_anim);
 }
 
-static void ozone_draw_header(
+OZONE_NOINLINE static void ozone_draw_header(
       ozone_handle_t *ozone,
       const uintptr_t *icons_tex,
       const uintptr_t *ozone_tex,