uboot-imx

MLK-22437-1 spi: fsl_qspi: Enable DDR mode on iMX7ULP

On iMX7ULP A0, PCC divider for QSPI has timing issue and it is
only possible to use the divider ratio equal to 1 (PCD=0).
This timing issue causes page program working abnormal if DDR_EN
is set. So current QSPI driver has disabled DDR mode on iMX7ULP

Since iMX7ULP B0 has fixed the issue, so re-enable the DDR mode
for iMX7ULP.

Signed-off-by: Ye Li <ye.li@nxp.com>