Documentation: mips/ingenic-tcu: eliminate duplicated word

Documentation: mips/ingenic-tcu: eliminate duplicated word

Drop the doubled word "to".

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Paul Cercueil <paul@crapouillou.net>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: linux-doc@vger.kernel.org
Cc: Paul Cercueil <paul@crapouillou.net>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: linux-mips@vger.kernel.org
Link: https://lore.kernel.org/r/20200707180414.10467-14-rdunlap@infradead.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>