uboot-imx

MLK-22697: configs: fix the imx6ul/ull mtdparts settings

imx6ul/ull were not set the mtdparts properly which causes the uuu cannot recognized the correct mtd partition.

Signed-off-by: Han Xu <han.xu@nxp.com>
(cherry picked from commit e7bbaadd03df7acbd84e5fbdbce037a369b82d68)