the VK_KHR_16bit_storage extension is enabled but all features are reported as FALSE for SI and CIK.

I found those features are only enabled with VI+ in mesa/src/amd/vulkan/radv_device.c

as contrast, the amdvlk driver support them.

16bit storage support is important for reducing shader bandwidth and gaining speed boost. (found 20%~50% speedup with the ncnn vulkan nerual network benchmark)

please consider implementing storageBuffer16BitAccess feature for SI and CIK.

Thanks!


		case VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_16BIT_STORAGE_FEATURES: {
			VkPhysicalDevice16BitStorageFeatures *features =
			    (VkPhysicalDevice16BitStorageFeatures*)ext;
			bool enabled = pdevice->rad_info.chip_class >= VI;
			features->storageBuffer16BitAccess = enabled;
			features->uniformAndStorageBuffer16BitAccess = enabled;
			features->storagePushConstant16 = enabled;
			features->storageInputOutput16 = enabled && HAVE_LLVM >= 0x900;
			break;
		}