Bump buildroot to 2019.02

bsp/buildroot/board/freescale/t1040d4rdb/readme.txt

@@ -0,0 +1,24 @@
+For the bootloader, NXP has stablized at SDK2.0 (final release). It is
+suggested to download the prebuilt from NXP downloads and follow the
+release notes for reflashing.
+
+To program the kernel and rootfs created by buildroot into the flash. The
+fast way is to tftp transfer the files via one of the network interfaces.
+Make sure your devkit has ipaddr and serverip defined to reach your tftp
+server.
+
+(Assuming the default u-boot env from NXP)
+1. Program the DTB to NOR flash
+
+    => tftpboot $loadaddr t1040d4rdb.dtb; protect off 0xe8800000 +$filesize; erase 0xe8800000 +$filesize; cp.b $loadaddr 0xe8800000 $filesize; protect on 0xe8800000 +$filesize; cmp.b $loadaddr 0xe8800000 $filesize
+
+2. Program the kernel and rootfs to NOR flash
+
+    => tftpboot $loadaddr uImage; protect off 0xe8020000 +$filesize; erase 0xe8020000 +$filesize; cp.b $loadaddr 0xe8020000 $filesize; protect on 0xe8020000 +$filesize; cmp.b $loadaddr 0xe8020000 $filesize
+    => tftpboot $loadaddr rootfs.cpio.uboot; protect off 0xe9300000 +$filesize; erase 0xe9300000 +$filesize; cp.b $loadaddr 0xe9300000 $filesize; protect on 0xe9300000 +$filesize; cmp.b $loadaddr 0xe9300000 $filesize
+
+3. Booting your new system
+
+    => boot
+
+    You can login with user "root".