Cholesky Decomposition for SPD matrix (POTRF)

This function computes the Cholesky decomposition of matrix $A$

$$A = L {L}^T$$

where $A$ is a dense symmetric positive-definite matrix of size $m \times m$, $L$ is a lower triangular matrix, and ${L}^T$ is the transposed matrix of $L$. The maximum matrix size supported in FPGA is templated by NMAX.