mtd: parsers: trx: allow to use on MediaTek MIPS SoCs

Buffalo sells some router devices which have trx-formatted firmware,
based on MediaTek MIPS SoCs. To use parser_trx on those devices, add
"RALINK" to dependency and allow to compile for MediaTek MIPS SoCs.

examples:

- WCR-1166DS  (MT7628)
- WSR-1166DHP (MT7621)
- WSR-2533DHP (MT7621)

Signed-off-by: INAGAKI Hiroshi <musashino.open@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20220213064045.1781-1-musashino.open@gmail.com

drivers/mtd/parsers/Kconfig

@@ -115,7 +115,7 @@ config MTD_AFS_PARTS
 
 config MTD_PARSER_TRX
 	tristate "Parser for TRX format partitions"
-	depends on MTD && (BCM47XX || ARCH_BCM_5301X || ARCH_MEDIATEK || COMPILE_TEST)
+	depends on MTD && (BCM47XX || ARCH_BCM_5301X || ARCH_MEDIATEK || RALINK || COMPILE_TEST)
 	help
 	  TRX is a firmware format used by Broadcom on their devices. It
 	  may contain up to 3/4 partitions (depending on the version).