FPGA: fix anr cmake file (#1420)

The anr sample cmake file was not allowing to target parts that did not contain the keywords "agilex" or "a10" or "s10".
This PR addresses this gap.

Author: yuguen

DirectProgramming/C++SYCL_FPGA/ReferenceDesigns/anr/src/CMakeLists.txt

@@ -21,10 +21,6 @@ else()
       set(DEVICE_FLAG "S10")
     elseif(FPGA_DEVICE_NAME MATCHES ".*agilex.*")
       set(DEVICE_FLAG "Agilex")
-    else()
-      message(FATAL_ERROR "An unrecognized or custom board was passed, but DEVICE_FLAG was not specified. \
-                           Please make sure you have set -DDEVICE_FLAG=A10, -DDEVICE_FLAG=S10 or \
-                           -DDEVICE_FLAG=Agilex.")
     endif()
     message(STATUS "Configuring the design with the following target: ${FPGA_DEVICE}")
 
@@ -38,6 +34,12 @@ else()
     endif()
 endif()
 
+if(NOT DEFINED DEVICE_FLAG)
+    message(FATAL_ERROR "An unrecognized or custom board was passed, but DEVICE_FLAG was not specified. \
+                         Please make sure you have set -DDEVICE_FLAG=A10, -DDEVICE_FLAG=S10 or \
+                         -DDEVICE_FLAG=Agilex.")
+endif()
+
 # These are Windows-specific flags:
 # 1. /EHsc This is a Windows-specific flag that enables exception handling in host code
 # 2. /Qactypes Include ac_types headers and link against ac_types emulation libraries