ar71xx: use dynamic partitioning for TP-Link TL-WA850RE v2

This moves the TP-Link TL-WA850RE v2 to dynamic partitioning and
will allow to use this for ath79 as well.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

target/linux/ar71xx/image/tiny-tp-link.mk

@@ -248,7 +248,7 @@ define Device/tl-wa850re-v2
   TPLINK_HWID := 0x08500002
   TPLINK_HWREV := 0
   IMAGE_SIZE := 3648k
-  MTDPARTS := spi0.0:128k(u-boot)ro,1344k(kernel),2304k(rootfs),256k(config)ro,64k(art)ro,3648k@0x20000(firmware)
+  MTDPARTS := spi0.0:128k(u-boot)ro,3648k(firmware),256k(config)ro,64k(art)ro
 endef
 TARGET_DEVICES += tl-wa850re-v2
 

tools/firmware-utils/src/tplink-safeloader.c

@@ -1240,8 +1240,7 @@ static struct device_info boards[] = {
 		*/
 		.partitions = {
 			{"fs-uboot", 0x00000, 0x20000},
-			{"os-image", 0x20000, 0x150000},
-			{"file-system", 0x170000, 0x240000},
+			{"firmware", 0x20000, 0x390000},
 			{"partition-table", 0x3b0000, 0x02000},
 			{"default-mac", 0x3c0000, 0x00020},
 			{"pin", 0x3c0100, 0x00020},