re-enable CPU_BASELINE=FP16 on Armv7 platform

cmake/OpenCVCompilerOptimizations.cmake

@@ -329,7 +329,7 @@ elseif(ARM OR AARCH64)
       ocv_update(CPU_VFPV3_FLAGS_ON "-mfpu=vfpv3")
       ocv_update(CPU_NEON_FLAGS_ON "-mfpu=neon")
       ocv_update(CPU_NEON_FLAGS_CONFLICT "-mfpu=[^ ]*")
-      ocv_update(CPU_FP16_FLAGS_ON "-mfpu=neon-fp16")
+      ocv_update(CPU_FP16_FLAGS_ON "-mfpu=neon-fp16 -mfp16-format=ieee")
       ocv_update(CPU_FP16_FLAGS_CONFLICT "-mfpu=[^ ]*")
     endif()
     ocv_update(CPU_FP16_IMPLIES "NEON")
@@ -617,9 +617,6 @@ macro(ocv_compiler_optimization_options)
   if(ENABLE_POWERPC)
     add_extra_compiler_option("-mcpu=G3 -mtune=G5")
   endif()
-  if(ARM)
-    add_extra_compiler_option("-mfp16-format=ieee")
-  endif(ARM)
 endmacro()
 
 macro(ocv_compiler_optimization_options_finalize)