MIPS: Alchemy: db1x00: use clk framework

Make use of the clk framework to set up and enable all PSC clocks.

Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
Cc: Linux-MIPS <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/7469/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --cc arch/mips/alchemy/devboards/db1200.c
Simple merge

diff --cc arch/mips/alchemy/devboards/db1300.c
Simple merge

diff --cc arch/mips/alchemy/devboards/db1550.c
Simple merge