configs/kontron_smarc_sal28: integrate RCW into rootfs image

Integrate the RCW into the storage device image, so the image can also
be used a boot source. The SoC expects the RCW at offset 4096 of the SD
card or eMMC.

Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

board/kontron/smarc-sal28/genimage.cfg

@@ -3,6 +3,12 @@ image sdcard-emmc.img {
 		gpt = true
 	}
 
+	partition rcw {
+		offset = 4k
+		in-partition-table = "no"
+		image = "rcw.bin"
+	}
+
 	partition u-boot {
 		offset = 1M
 		in-partition-table = "no"

configs/kontron_smarc_sal28_defconfig

@@ -16,6 +16,7 @@ BR2_LINUX_KERNEL_INTREE_DTS_NAME="freescale/fsl-ls1028a-kontron-sl28 freescale/f
 BR2_LINUX_KERNEL_DTB_KEEP_DIRNAME=y
 BR2_LINUX_KERNEL_INSTALL_TARGET=y
 BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
+BR2_PACKAGE_RCW_SMARC_SAL28=y
 BR2_TARGET_ROOTFS_EXT2=y
 BR2_TARGET_ROOTFS_EXT2_4=y
 BR2_TARGET_ROOTFS_EXT2_SIZE="128M"