bcm53xx: request Seama parser on DIR-885L directly

It's more reliable as mtd subsystem doesn't have to blindly try that
parser. It allows disabling MTD_SPLIT_FIRMWARE completely (TRX is
handled in a similar way).

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>

target/linux/bcm53xx/config-4.14

@@ -247,7 +247,6 @@ CONFIG_MTD_NAND_ECC=y
 CONFIG_MTD_PARSER_TRX=y
 # CONFIG_MTD_PHYSMAP_OF is not set
 CONFIG_MTD_SPI_NOR=y
-CONFIG_MTD_SPLIT_FIRMWARE=y
 CONFIG_MTD_SPLIT_SEAMA_FW=y
 CONFIG_MTD_UBI=y
 CONFIG_MTD_UBI_BEB_LIMIT=20

target/linux/bcm53xx/patches-4.14/321-ARM-dts-BCM5301X-Describe-partition-formats.patch

@@ -0,0 +1,25 @@
+From 7166207bd1d8c46d09d640d46afc685df9bb9083 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Date: Thu, 22 Nov 2018 09:21:49 +0100
+Subject: [PATCH] ARM: dts: BCM5301X: Describe partition formats
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+It's needed by OpenWrt for custom partitioning.
+
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+---
+ arch/arm/boot/dts/bcm47094-dlink-dir-885l.dts | 1 +
+ 1 file changed, 1 insertion(+)
+
+--- a/arch/arm/boot/dts/bcm47094-dlink-dir-885l.dts
++++ b/arch/arm/boot/dts/bcm47094-dlink-dir-885l.dts
+@@ -34,6 +34,7 @@
+ 				partition@0 {
+ 					label = "firmware";
+ 					reg = <0x00000000 0x08000000>;
++					compatible = "seama";
+ 				};
+ 			};
+ 		};