turnip: Add TU_DEBUG=layout for dumping image layouts.

This was useful for comparing image allocations between gfxbench
gl_5_normal and vk_5_normal to see if rendering was generally equivalent
(formats, MSAA, UBWC choices, and notably gfxbench vk was choosing DXT5
instead of ASTC on non-android builds!)

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/15982>

src/freedreno/vulkan/tu_device.c

@@ -330,6 +330,7 @@ static const struct debug_control tu_debug_options[] = {
    { "sysmem", TU_DEBUG_SYSMEM },
    { "gmem", TU_DEBUG_GMEM },
    { "forcebin", TU_DEBUG_FORCEBIN },
+   { "layout", TU_DEBUG_LAYOUT },
    { "noubwc", TU_DEBUG_NOUBWC },
    { "nomultipos", TU_DEBUG_NOMULTIPOS },
    { "nolrz", TU_DEBUG_NOLRZ },

src/freedreno/vulkan/tu_image.c

@@ -506,6 +506,9 @@ tu_image_init(struct tu_device *device, struct tu_image *image,
          return vk_error(device, VK_ERROR_INVALID_DRM_FORMAT_MODIFIER_PLANE_LAYOUT_EXT);
       }
 
+      if (device->instance->debug_flags & TU_DEBUG_LAYOUT)
+         fdl_dump_layout(layout);
+
       /* fdl6_layout can't take explicit offset without explicit pitch
        * add offset manually for extra layouts for planes
        */

src/freedreno/vulkan/tu_private.h

@@ -268,6 +268,7 @@ enum tu_debug_flags
    TU_DEBUG_GMEM = 1 << 13,
    TU_DEBUG_RAST_ORDER = 1 << 14,
    TU_DEBUG_UNALIGNED_STORE = 1 << 15,
+   TU_DEBUG_LAYOUT = 1 << 16,
 };
 
 struct tu_instance