Staging: bcm: Return -ENOMEM instead of -1 when memory not acquired in nmv.c

This patch changes the return statement on two
conditions where memory could not be acquired.
It returns -ENOMEM instead of -1.

Signed-off-by: Kevin McKinney <klmckinney1@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>