ARM: i.MX27 clk: Use of_clk_init() for DT case

Replace .init_time() hook with of_clk_init() for DT targets.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>

diff --cc arch/arm/mach-imx/clk-imx27.c
Simple merge

diff --cc arch/arm/mach-imx/common.h
Simple merge

diff --cc arch/arm/mach-imx/imx27-dt.c
Simple merge