package/libftdi: remove unused license

Commit 9b0b15e90b (package/libftdi: add license) was too hastily fixed,
with confusion between libftdi and libftdi1. The MIT-licensed file is
not present in libftdi; it is only in libftdi1.

Remove the unused MIT license from the list.

Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit 4a8f06e0f23facc9c648333a0a0f72cb8ca684e3)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/libftdi/libftdi.mk

@@ -6,7 +6,7 @@
 
 LIBFTDI_VERSION = 0.20
 LIBFTDI_SITE = http://www.intra2net.com/en/developer/libftdi/download
-LIBFTDI_LICENSE = LGPL-2.1 (libftdi), MIT (libftdi)
+LIBFTDI_LICENSE = LGPL-2.1 (libftdi)
 LIBFTDI_LICENSE_FILES = LICENSE COPYING.LIB
 LIBFTDI_DEPENDENCIES = libusb-compat libusb
 HOST_LIBFTDI_DEPENDENCIES = host-libusb-compat host-libusb