[SYCL] Fix bfloat16::to_float() host implementation.

Signed-off-by: Konstantin S Bobrovsky <[email protected]>

Author: kbobrovs

sycl/include/sycl/ext/oneapi/experimental/bfloat16.hpp

@@ -63,10 +63,9 @@ class bfloat16 {
     return __spirv_ConvertBF16ToFINTEL(a);
 #endif
 #else
-    // Shift temporary variable to silence the warning
     uint32_t bits = a;
     bits <<= 16;
-    return static_cast<float>(bits);
+    return *(reinterpret_cast<float *>(&bits));
 #endif
   }