intel: Add support for depth/stencil clears via render pass load op

I want to get the demos to stop issuing explicit image clears entirely
before I change their semantics to require being outside the renderpass.

Color clears were already supported -- this just adds plumbing for
depth/stencil.

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
diff --git a/icd/intel/cmd_priv.h b/icd/intel/cmd_priv.h
index 6ca9e2c..23220e8 100644
--- a/icd/intel/cmd_priv.h
+++ b/icd/intel/cmd_priv.h
@@ -534,4 +534,13 @@
     uint32_t                            rangeCount,
     const VkImageSubresourceRange      *pRanges);
 
+void cmd_meta_clear_depth_stencil_image(
+    VkCmdBuffer                              cmdBuffer,
+    VkImage                                   image,
+    VkImageLayout                            imageLayout,
+    float                                       depth,
+    uint32_t                                    stencil,
+    uint32_t                                    rangeCount,
+    const VkImageSubresourceRange*          pRanges);
+
 #endif /* CMD_PRIV_H */