staging: frontier: remove driver

The driver hasn't been cleaned up and it doesn't look like anyone is
working on it anymore (including the original author). So remove the
driver from the kernel. If someone wants to work on cleaning it up and
moving it out of staging, this commit can be reverted.

Signed-off-by: Kristina Martšenko <kristina.martsenko@gmail.com>
Cc: David Täht <d@teklibre.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --cc MAINTAINERS
Simple merge

diff --cc drivers/staging/Kconfig
Simple merge

diff --cc drivers/staging/Makefile
Simple merge

diff --cc drivers/staging/frontier/Kconfig
Simple merge

diff --cc drivers/staging/frontier/Makefile
Simple merge

diff --cc drivers/staging/frontier/README
Simple merge

diff --cc drivers/staging/frontier/TODO
Simple merge

diff --cc drivers/staging/frontier/alphatrack.c
Simple merge

diff --cc drivers/staging/frontier/alphatrack.h
Simple merge

diff --cc drivers/staging/frontier/tranzport.c
Simple merge