ARM: S5PC1XX: Move to using generic clksrc_clk for clock code

Remove the copy of the old s3c64xx struct clksrc_clk and use the new one
in plat-samsung. This eliminates a bug in the set_parent() call where it
failed to set the clk->parent after sucesfully updating the clock.

The script that was used to automate much of the process will be supplied
seperately.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>