staging: netlogic: allocate right size in devm_kzalloc

sizeof when applied to a pointer typed expression gives
the size of the pointer.

The semantic patch that makes this change is available
in scripts/coccinelle/misc/noderef.cocci.

Signed-off-by: Madhusudhanan Ravindran <mravindr@visteon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>