hdl/modules/pcie/*: add DDR_ADDR_WIDTH constant to *_const_pkg

Now, the DDR_ADDR_WIDTH is defined in each *_const_pkg
package to ease its reuse by other logic
hdl/top/ml_605/*_dsp_fmc130m_4ch/*: use *_const_pkg constants

Replaced hardcoded constant values to the ones
available in the bpm core constant packages
hdl/top/ml_605/*_dsp_fmc130m_4ch/*: change xwb_acq_core addressing

The xwb_acq_core had a wrong addressing granularity.
The correct one is BYTE