radv: fix primitive reset index emission

This was meant to be checking the index type to get the correct
index not the last emitted one. This fixes:
dEQP-VK.pipeline.input_assembly.primitive_restart.index_type_uint32.triangle_strip_with_adjacency

Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Cc: "13.0 17.0" <mesa-stable@lists.freedesktop.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
(cherry picked from commit d06e168b878be45029bf66c2ac627d16144a7823)
diff --git a/src/amd/vulkan/radv_cmd_buffer.c b/src/amd/vulkan/radv_cmd_buffer.c
index 294a4a6..fae0b23 100644
--- a/src/amd/vulkan/radv_cmd_buffer.c
+++ b/src/amd/vulkan/radv_cmd_buffer.c
@@ -1974,7 +1974,7 @@
 
 static void radv_emit_primitive_reset_index(struct radv_cmd_buffer *cmd_buffer)
 {
-	uint32_t primitive_reset_index = cmd_buffer->state.last_primitive_reset_index ? 0xffffffffu : 0xffffu;
+	uint32_t primitive_reset_index = cmd_buffer->state.index_type ? 0xffffffffu : 0xffffu;
 
 	if (cmd_buffer->state.pipeline->graphics.prim_restart_enable &&
 	    primitive_reset_index != cmd_buffer->state.last_primitive_reset_index) {