MAINTAINERS: rectify entry for HIKEY960 ONBOARD USB GPIO HUB DRIVER

Commit 7a6ff4c4 ("misc: hisi_hikey_usb: Driver to support onboard
USB gpio hub on Hikey960") refers to the non-existing file
Documentation/devicetree/bindings/misc/hisilicon-hikey-usb.yaml, but
this commit's patch series does not add any related devicetree binding
in misc.

So, just drop this file reference in HIKEY960 ONBOARD USB GPIO HUB DRIVER.

Link: https://lkml.kernel.org/r/20211026141902.4865-3-lukas.bulwahn@gmail.com


Fixes: 7a6ff4c4 ("misc: hisi_hikey_usb: Driver to support onboard USB gpio hub on Hikey960")
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Cc: Anitha Chrisanthus <anitha.chrisanthus@intel.com>
Cc: Edmund Dea <edmund.j.dea@intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Joe Perches <joe@perches.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Cc: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
Cc: Punit Agrawal <punit1.agrawal@toshiba.co.jp>
Cc: Ralf Ramsauer <ralf.ramsauer@oth-regensburg.de>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Wilken Gottwalt <wilken.gottwalt@posteo.net>
Cc: Yu Chen <chenyu56@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>