clover: typo fix PIPE_COMPUTE_MAX_CLOCK_FREQUENCY

Since 96102d20c21ee0fdb2c56e1a984e5d61f3d06f74 we couldn't build,
because we defined PIPE_COMPUTE_CAP_MAX_CLOCK_FREQUENCY instead of
PIPE_COMPUTE_MAX_CLOCK_FREQUENCY.

Signed-off-by: Igor Gnatenko <i.gnatenko.brain@gmail.com>