ARM: keystone2: Get rid of unused clock files

ARM: keystone2: Get rid of unused clock files

With commit fe772ebd285b ("ARM: keystone2: Use common definition for
clk_get_rate"), we have centralized the clock code into a common clock
logic and the redundant files, unfortunately remained... Clean that
up.

Signed-off-by: Nishanth Menon <[email protected]>
Acked-by: Lokesh Vutla <[email protected]>
Reviewed-by: Tom Rini <[email protected]>