radv: lower pack_[64/32]_* via nir_lower_alu_to_scalar()

Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6527>
diff --git a/src/amd/vulkan/radv_shader.c b/src/amd/vulkan/radv_shader.c
index 6950cb0..f48438d 100644
--- a/src/amd/vulkan/radv_shader.c
+++ b/src/amd/vulkan/radv_shader.c
@@ -62,6 +62,9 @@
 	.lower_pack_unorm_2x16 = true,
 	.lower_pack_unorm_4x8 = true,
 	.lower_pack_half_2x16 = true,
+	.lower_pack_64_2x32 = true,
+	.lower_pack_64_4x16 = true,
+	.lower_pack_32_2x16 = true,
 	.lower_unpack_snorm_2x16 = true,
 	.lower_unpack_snorm_4x8 = true,
 	.lower_unpack_unorm_2x16 = true,