staging/mt29f_spinand: Terminate of match table

Failure to terminate this match table can lead to boot failures
depending on where the compiler places the match table.

Cc: Kamlakant Patel <kamlakant.patel@broadcom.com>
Cc: Mona Anonuevo <manonuevo@micron.com>
Cc: linux-mtd@lists.infradead.org
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>