layers: GL168, fix bad compressed texel block size
The image<->buffer copy validation was checking against texel block
sizes, but needed the block size in byte. Fixed the bad validation
errors and renamed existing util function and updated a compressed
texture size to match the spec.
Change-Id: I40b9635a4fab131ab1525da51e94c4c5577217be
diff --git a/layers/vk_layer_utils.h b/layers/vk_layer_utils.h
index 4151ffe..fcd33ee 100644
--- a/layers/vk_layer_utils.h
+++ b/layers/vk_layer_utils.h
@@ -120,7 +120,7 @@
VK_LAYER_EXPORT bool vk_format_is_float(VkFormat format);
VK_LAYER_EXPORT bool vk_format_is_srgb(VkFormat format);
VK_LAYER_EXPORT bool vk_format_is_compressed(VkFormat format);
-VK_LAYER_EXPORT VkExtent2D vk_format_compressed_block_size(VkFormat format);
+VK_LAYER_EXPORT VkExtent2D vk_format_compressed_texel_block_extents(VkFormat format);
VK_LAYER_EXPORT size_t vk_format_get_size(VkFormat format);
VK_LAYER_EXPORT unsigned int vk_format_get_channel_count(VkFormat format);
VK_LAYER_EXPORT VkFormatCompatibilityClass vk_format_get_compatibility_class(VkFormat format);