ARM: mvebu: a38x: Correct mismatched bound warnings

ARM: mvebu: a38x: Correct mismatched bound warnings

With gcc-11 we see:
drivers/ddr/marvell/a38x/ddr3_debug.c:672:47: error: argument 2 of type 'u32[5]' {aka 'unsigned int[5]'} with mismatched bound [-Werror=array-parameter=]
  672 | int ddr3_tip_read_adll_value(u32 dev_num, u32 pup_values[MAX_INTERFACE_NUM * MAX_BUS_NUM],
      |                                           ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from drivers/ddr/marvell/a38x/ddr3_training_ip_engine.h:10,
                 from drivers/ddr/marvell/a38x/ddr3_init.h:17,
                 from drivers/ddr/marvell/a38x/ddr3_debug.c:6:
drivers/ddr/marvell/a38x/ddr3_training_ip_flow.h:116:47: note: previously declared as 'u32[]' {aka 'unsigned int[]'}

And similar warnings.  Correct these by updating the prototype.  Remove
the prototype for ddr3_tip_read_pup_value as it is unused.

Signed-off-by: Tom Rini <trini@konsulko.com>