Multidimensional array banking is incorrect

[rachitnigam]

The compiler flattens all array declarations of the form:

decl a: bit<32>[4 bank 2][4 bank 2];

into

int[10][10] a;
#... partition cyclic factor = 2*2

The banking structure it produces is:

0	1	2	3
0	1	2	3

However, logically, it should've produced the banking structure:

0	1	0	1
2	3	2	3

To fix this, three things need to be done:

• Stop flattening all array accesses.
• Generate dim based banking pragmas for the arrays
• If SDSoC doesn't allow for multidimensional arrays on interfaces, write a library to pack and unpack single dimensional arrays into multidimensional ones.