FPGA: Force II=1 in Cholesky inversion IP (oneapi-src#2574)

This change forces the main compute loop of the Cholesky matrix inversion IP to have an II of 1.

Author: yuguen

DirectProgramming/C++SYCL_FPGA/include/streaming_cholesky_inversion.hpp

@@ -164,7 +164,9 @@ struct StreamingCholeskyInversion {
       int diagonal_size = (kColumns > raw_latency ? kColumns : raw_latency) - 1;
       int col = diagonal_number;
       int row = 0;
-
+ 
+ 
+      [[intel::initiation_interval(1)]] // NO-FORMAT: Attribute
       [[intel::ivdep(raw_latency)]]  // NO-FORMAT: Attribute
       for (int it = 0; it < kTotalIterations + kInitIterations; it++) {
         // Only perform work when in not dummy iterations
@@ -267,4 +269,4 @@ struct StreamingCholeskyInversion {
 
 }  // namespace fpga_linalg
 
-#endif /* __STREAMING_CHOLESKY_INVERSION_HPP__ */
+#endif /* __STREAMING_CHOLESKY_INVERSION_HPP__ */