s6ddrphy: improve genericity by adding wr_bitslip and dqs_ddr_alignment parameters bitslip parameter is renamed to rd_bitslip
rename milkymist-ng to MiSoC
use git commit id as version
top: set platform ID
cpuif.py: add _ADDR and _SIZE defines for each register

Signed-off-by: Robert Jordens <jordens@gmail.com>
common.mak: -Os instead of -O3, smaller bios (<32k)
s6ddrphy: drop unused outputs, shortens verilog and produces more readable warnings

Signed-off-by: Robert Jordens <jordens@gmail.com>
common.mak: specify python3
s6ddrphy: use shorter Instance argument notation

Signed-off-by: Robert Jordens <jordens@gmail.com>
common.mak: drop the echo from the version tag finding, did not work here, use python -c

Signed-off-by: Robert Jordens <jordens@gmail.com>