ARM: imx: rework mx27_pm_init() call

mx27_pm_init() uses its own initcall, unlike all of the other
functions like it. Replacing the initcall with a .init_late()
callback makes imx27 more like the others and lets us remove
the last caller of cpu_is_mx27().

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/mach-imx/imx27-dt.c

@@ -27,5 +27,6 @@ DT_MACHINE_START(IMX27_DT, "Freescale i.MX27 (Device Tree Support)")
 	.map_io		= mx27_map_io,
 	.init_early	= imx27_init_early,
 	.init_irq	= mx27_init_irq,
+	.init_late	= imx27_pm_init,
 	.dt_compat	= imx27_dt_board_compat,
 MACHINE_END