MIPS: mscc: Fix configuration name for ocelot legacy boards

Ocelots is supported by the generic MIPS build so make it clears that
LEGACY_BOARD_OCELOT is only needed for legacy boards which didn't have
bootloader supporting device tree.
Signed-off-by: NGregory CLEMENT <gregory.clement@bootlin.com>
Acked-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: NThomas Bogendoerfer <tsbogend@alpha.franken.de>

arch/mips/generic/Kconfig

@@ -31,7 +31,7 @@ comment "MSCC Ocelot doesn't work with SEAD3 enabled"
 	depends on LEGACY_BOARD_SEAD3
 
 config LEGACY_BOARD_OCELOT
-	bool "Support MSCC Ocelot boards"
+	bool "Legacy support for Ocelot based boards"
 	depends on LEGACY_BOARD_SEAD3=n
 	select LEGACY_BOARDS
 	select SOC_VCOREIII