cxgb4: move device dump arrays in header to C file

Move all arrays related to device dump in header file to C file.
Also, move the function that shares the arrays to the same C file.

Fixes following warnings reported by make W=1 in several places:
cudbg_entity.h:513:18: warning: 't6_hma_ireg_array' defined but not
used [-Wunused-const-variable=]
  513 | static const u32 t6_hma_ireg_array[][IREG_NUM_ELEM] = {

Fixes: a7975a2f ("cxgb4: collect register dump")
Fixes: 17b332f4

 ("cxgb4: add support to read serial flash")
Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>