ARM: OMAP2+: Make display related init into device_initcall

We can initialize almost everything at normal module_init time with
ti-sysc except for clocks and timers. To prepare for that, let's make
display init into device_initcall as otherwise we'll be calling
of_platform_populate() before the parent has probed.

Cc: Laurent Pinchart <[e-mail]>
Cc: Tomi Valkeinen <[e-mail]>
Signed-off-by: Tony Lindgren <[e-mail]>

arch/arm/mach-omap2/board-generic.c

···
 static void __init __maybe_unused omap_generic_init(void)
 {
 	pdata_quirks_init(omap_dt_match_table);
-
-	omapdss_init_of();
 	omap_soc_device_init();
 }
 

arch/arm/mach-omap2/common.h

···
 /* SoC specific clock initializer */
 int omap_clk_init(void);
 
-int __init omapdss_init_of(void);
-
 #endif /* __ASSEMBLER__ */
 #endif /* __ARCH_ARM_MACH_OMAP2PLUS_COMMON_H */

arch/arm/mach-omap2/display.c

···
 	return NULL;
 }
 
-int __init omapdss_init_of(void)
+static int __init omapdss_init_of(void)
 {
 	int r;
 	struct device_node *node;
···
 
 	return omapdss_init_fbdev();
 }
+omap_device_initcall(omapdss_init_of);