crda: Fix error: `keys’ defined but not used

Fix error: ‘keys’ defined but not used [-Werror=unused-const-variable=]
by informing GCC keys is unused.

Signed-off-by: Jelle van der Waa <jelle@vdwaa.nl>
Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org>
1 file changed