Merged
requested to merge taw/linux:MR_fix_dtb_append_allow_extra_fdt_in_r8 into digitalSTROM_4.1.19
tested both variants, boot with appended dtb and with extra dtb, appended dtb only taken if r8 contains no dtb @chitz #15072
tested both variants, boot with appended dtb and with extra dtb, appended dtb only taken if r8 contains no dtb @chitz #15072