defaults: Make SPI NOR accessible in initramfs

Aside of spi_nor, imx_sdma is needed for NOR to probe at all; and
ofpart is needed for it to create separate partitions as defined
in the device tree.

default/initramfs-tools/modules.d/librem5

 bq25890_charger
 tps6598x
+imx_sdma
+ofpart
+spi_nor