[SYCL] Move the SYCL_EXT_ONEAPI_SRGB macro to feature_test.hpp.in (#5051)

All the extension feature test macros are defined in the
feature_test.hpp.in file.

Author: Pavel Samolysov

sycl/include/CL/sycl/feature_test.hpp.in

@@ -43,6 +43,7 @@ namespace sycl {
 #define SYCL_EXT_ONEAPI_ND_RANGE_REDUCTIONS 1
 #define SYCL_EXT_ONEAPI_DEFAULT_CONTEXT 1
 #define SYCL_EXT_ONEAPI_USE_PINNED_HOST_MEMORY_PROPERTY 1
+#define SYCL_EXT_ONEAPI_SRGB 1
 #define SYCL_EXT_ONEAPI_SUB_GROUP 1
 #define SYCL_EXT_INTEL_BF16_CONVERSION 1
 #define SYCL_EXT_INTEL_BITCAST 1

sycl/include/CL/sycl/image.hpp

@@ -17,9 +17,6 @@
 #include <cstddef>
 #include <sycl/ext/oneapi/accessor_property_list.hpp>
 
-// sRGB Extension Support
-#define SYCL_EXT_ONEAPI_SRGB 1
-
 __SYCL_INLINE_NAMESPACE(cl) {
 namespace sycl {