ddr: altera: Clean up rw_mgr_mem_calibrate_vfifo_find_dqs_en_phase() part 4

Implement common sdr_find_phase_delay() function and convert all
places which use such code to this unified function. No functional
change to the code.

Signed-off-by: Marek Vasut <marex@denx.de>
1 file changed