Staging: bcm: Fix ERROR: return is not a function, parentheses are not required.

This patch fixes the following error reported
by checkpatch.pl in nvm.c: "ERROR: return is
not a function, parentheses are not required".

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