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-3430sdp.c b/arch/arm/mach-omap2/board-3430sdp.c
index 4961f3b..ecdd2c3 100644
--- a/arch/arm/mach-omap2/board-3430sdp.c
+++ b/arch/arm/mach-omap2/board-3430sdp.c
@@ -803,18 +803,12 @@
 	usb_ehci_init(&ehci_pdata);
 }
 
-static void __init omap_3430sdp_map_io(void)
-{
-	omap2_set_globals_3xxx();
-	omap34xx_map_common_io();
-}
-
 MACHINE_START(OMAP_3430SDP, "OMAP3430 3430SDP board")
 	/* Maintainer: Syed Khasim - Texas Instruments Inc */
 	.phys_io	= 0x48000000,
 	.io_pg_offst	= ((0xfa000000) >> 18) & 0xfffc,
 	.boot_params	= 0x80000100,
-	.map_io		= omap_3430sdp_map_io,
+	.map_io		= omap3_map_io,
 	.reserve	= omap_reserve,
 	.init_irq	= omap_3430sdp_init_irq,
 	.init_machine	= omap_3430sdp_init,