Fix logic for multitarget builds

Author: vlad-perevezentsev

CMakeLists.txt

@@ -99,9 +99,9 @@ if ("x${DPNP_SYCL_TARGETS}" STREQUAL "x")
         set(_use_onemkl_interfaces_hip ON)
 
         if ("x${_dpnp_sycl_targets}" STREQUAL "x")
-            set(_dpnp_sycl_targets "amdgcn-amd-amdhsa,${_dpnp_sycl_targets}")
-        else()
             set(_dpnp_sycl_targets "amdgcn-amd-amdhsa,spir64-unknown-unknown")
+        else()
+            set(_dpnp_sycl_targets "amdgcn-amd-amdhsa,${_dpnp_sycl_targets}")
         endif()
     endif()
 else()