[SYCL] Add opencl_generic as a valid address space for __SPIRV_ATOMICS

Author: Pavel Samolysov

sycl/include/CL/__spirv/spirv_ops.hpp

@@ -239,7 +239,8 @@ extern SYCL_EXTERNAL TempRetT __spirv_ImageSampleExplicitLod(SampledType,
 
 #define __SPIRV_ATOMICS(macro, Arg)                                            \
   macro(__attribute__((opencl_global)), Arg)                                   \
-      macro(__attribute__((opencl_local)), Arg)
+      macro(__attribute__((opencl_local)), Arg)                                \
+          macro(__attribute__((opencl_generic)), Arg)
 
 __SPIRV_ATOMICS(__SPIRV_ATOMIC_FLOAT, float)
 __SPIRV_ATOMICS(__SPIRV_ATOMIC_FLOAT, double)