toolbox: rmmod: fix module unloading

Replace "-" with "_" in module name. This would keep
rmmod compatible with module-init-tools version of rmmod

Change-Id: I4470d9a98bc2f299acd94859fca4403aee279d2b
Signed-off-by: Vishal Bhoj <vishal.bhoj@linaro.org>
1 file changed