Staging: lustre: lmv_obd: Remove redundant test.

filp != NULL is already checked, so no need to check it again.

Signed-off-by: Sandhya Bankar <bankarsandhya512@gmail.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>