bug-14538: Remove validation error codes

https://cvs.khronos.org/bugzilla/show_bug.cgi?id=14538
diff --git a/icd/intel/mem.c b/icd/intel/mem.c
index 05b0e63..3739978 100644
--- a/icd/intel/mem.c
+++ b/icd/intel/mem.c
@@ -45,7 +45,7 @@
             "vk-gpu-memory", info->allocationSize, 0);
     if (!mem->bo) {
         intel_mem_free(mem);
-        return VK_ERROR_UNKNOWN;
+        return VK_ERROR_OUT_OF_DEVICE_MEMORY;
     }
 
     mem->size = info->allocationSize;
@@ -94,7 +94,7 @@
 
     *ppData = (void *)((size_t)ptr + offset);
 
-    return (ptr) ? VK_SUCCESS : VK_ERROR_UNKNOWN;
+    return (ptr) ? VK_SUCCESS : VK_ERROR_MEMORY_MAP_FAILED;
 }
 
 ICD_EXPORT void VKAPI vkUnmapMemory(