ARM: OMAP2+: PRM: initialize some PRM functions early

Some PRM functions will need to be called by the hwmod code early in
kernel init.  To handle this, split the PRM initialization code into
early and late phases.  The early init is handled via mach-omap2/io.c,
while the late init is handled by subsys_initcall().

Signed-off-by: Paul Walmsley <paul@pwsan.com>

diff --git a/arch/arm/mach-omap2/prm3xxx.h b/arch/arm/mach-omap2/prm3xxx.h
index 10cd41a..277f717 100644
--- a/arch/arm/mach-omap2/prm3xxx.h
+++ b/arch/arm/mach-omap2/prm3xxx.h
@@ -154,6 +154,7 @@
 
 extern void omap3xxx_prm_dpll3_reset(void);
 
+extern int __init omap3xxx_prm_init(void);
 extern u32 omap3xxx_prm_get_reset_sources(void);
 
 #endif /* __ASSEMBLER */