emmc: rescan cmd delay windows to set cmd delay [1/1]

emmc: rescan cmd delay windows to set cmd delay [1/1]

PD#SWPL-10095

Problem:
command delay may too close to the command edge

Solution:
rescan cmd delay windows and find cmd delay value
after data alignment

Verify:
passed on g12b

Change-Id: I258e93aa87e35c843c45f62c58af3609bebe0901
Signed-off-by: Ruixuan Li <ruixuan.li@amlogic.com>