MAINTAINERS: Remove {ehci,uhci}-platform.c from ARM/VT8500 entry

ARM/VT8500 is marked as Orphan. It includes ehci-platform.c and
uhci-platform.c in its file list, even though uhci-platform.c is included
from uhci-hcd.c and ehci-platform.c is used by several platforms.
Listing those files as part of an orphan platform does not add value,
even more so since they are marked as supported as part of generic ehci
and uhci support. Drop the files from the ARM/VT8500 entry.

Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20240504141436.647782-1-linux@roeck-us.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>