omap3: introduce omap3_map_io

Most OMAP3-based boards use exactly the same code for .map_io method in
the machine_desc structure.
This patch introduces omap3_map_io and updates board-* files to use it
as .map_io method.

Signed-off-by: Mike Rapoport <mike@compulab.co.il>
Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/mach-omap2/board-ldp.c b/arch/arm/mach-omap2/board-ldp.c
index 9bcb182..07e1f73 100644
--- a/arch/arm/mach-omap2/board-ldp.c
+++ b/arch/arm/mach-omap2/board-ldp.c
@@ -406,17 +406,11 @@
 	ldp_vmmc1_supply.dev = mmc[0].dev;
 }
 
-static void __init omap_ldp_map_io(void)
-{
-	omap2_set_globals_3xxx();
-	omap34xx_map_common_io();
-}
-
 MACHINE_START(OMAP_LDP, "OMAP LDP board")
 	.phys_io	= 0x48000000,
 	.io_pg_offst	= ((0xfa000000) >> 18) & 0xfffc,
 	.boot_params	= 0x80000100,
-	.map_io		= omap_ldp_map_io,
+	.map_io		= omap3_map_io,
 	.reserve	= omap_reserve,
 	.init_irq	= omap_ldp_init_irq,
 	.init_machine	= omap_ldp_init,