staging:nvec: fix typo in comment

Fix spelling error in comment in function tegra_nvec_remove.

Signed-off-by: Shailendra Verma <shailendra.capricorn@gmail.com>
Acked-by: Marc Dietrich <marvin24@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>