sim: add missing values to array initializers

sim: add missing values to array initializers

The sim code has a lot of static initializer for options and devices, but
since they aren't using newer struct style, they have to specify a value
for every option otherwise gcc spits a lot of warnings about "missing
initializer".  So add NULL/0 stubs for pointers/values.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>