Do not use combined format as depth target in EGL render tests.

Bug: 20949289
Change-Id: I63f5bc6abb335ee1d097f93e87d16fcc54799f3e
diff --git a/modules/egl/teglRenderTests.cpp b/modules/egl/teglRenderTests.cpp
index dfc61b6..06368c3 100644
--- a/modules/egl/teglRenderTests.cpp
+++ b/modules/egl/teglRenderTests.cpp
@@ -363,7 +363,7 @@
 		case 0:		return tcu::TextureFormat();
 		case 8:		return tcu::TextureFormat(tcu::TextureFormat::D, tcu::TextureFormat::UNORM_INT8);
 		case 16:	return tcu::TextureFormat(tcu::TextureFormat::D, tcu::TextureFormat::UNORM_INT16);
-		case 24:	return tcu::TextureFormat(tcu::TextureFormat::D, tcu::TextureFormat::UNSIGNED_INT_24_8);
+		case 24:	return tcu::TextureFormat(tcu::TextureFormat::D, tcu::TextureFormat::UNORM_INT24);
 		case 32:
 		default:	return tcu::TextureFormat(tcu::TextureFormat::D, tcu::TextureFormat::FLOAT);
 	}