ARM: S3C64XX: Remove duplicated camera clock

Camera clock defined two times. One in init_clocks_off array with
"cam" name, second in clksrcs array with "camera" name. Leave
second definition because clock have divider.

Signed-off-by: Andrey Gusakov <dron0gus@gmail.com>
Reviewed-by: Tomasz Figa <tomasz.figa@gmail.com>
Reviewed-by: Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>