rockpi4-plus: finetune partition table

target/aarch64/rockpi4-plus/extlinux.conf

@@ -1,4 +1,4 @@
 label rockpi4-plus-openadk
   kernel /kernel
   devicetree /rk3399-rock-pi-4b.dtb
-  append console=ttyS2,115200n8 root=/dev/mmcblk0p4 rootwait
+  append console=ttyS2,115200n8 root=/dev/mmcblk0p2 rootwait

target/aarch64/rockpi4-plus/genimage.cfg

@@ -15,11 +15,13 @@ image sdcard.img {
 	}
 
 	partition loader1 {
+		in-partition-table = "no"
 		image = "idbloader.img"
 		offset = 32K
 	}
 
 	partition loader2 {
+		in-partition-table = "no"
 		image = "u-boot.itb"
 		offset = 8M
 	}