Revert "tty: serial: Add UART driver for Cortina-Access platform"

This reverts commit b61c8bf4.  It never
made it to a public mailing list and still needs some work based on the
review comments.  So revert it for now.

Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/r/CAMuHMdXA9-ajoAza2JAW5879ECieMm1dbBbKHgJhDa7=3kWu3w@mail.gmail.com


Cc: Jason Li <jason.li@cortina-access.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>