Updates for issue #281
Created by: silabs-oysteink
Removed parameter REGFILE_NUM_READ_PORTS from pkg file. Introduced more XIF toplevel parameters. Introduced localparam REGFILE_NUM_READ_PORTS in toplevel, and setting this to 2 if no XIF is present, and X_NUM_RS is X_EXT=1.
Signed-off-by: Oystein Knauserud Oystein.Knauserud@silabs.com