MIPS: BCM63XX: kconfig: Remove blank help text

Blank help texts are probably either a typo, a Kconfig misunderstanding,
or some kind of half-committing to adding a help text (in which case a
TODO comment would be clearer, if the help text really can't be added
right away).

Best to remove them, IMO.
Signed-off-by: NUlf Magnusson <ulfalizer@gmail.com>
Acked-by: NRandy Dunlap <rdunlap@infradead.org>
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>

arch/mips/bcm63xx/boards/Kconfig

@@ -7,6 +7,5 @@ choice
 config BOARD_BCM963XX
        bool "Generic Broadcom 963xx boards"
 	select SSB
-       help
 
 endchoice