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>

arch/arm/mach-omap2/board-zoom3.c

@@ -25,12 +25,6 @@
 #include "mux.h"
 #include "sdram-hynix-h8mbx00u0mer-0em.h"
 
-static void __init omap_zoom_map_io(void)
-{
-	omap2_set_globals_3xxx();
-	omap34xx_map_common_io();
-}
-
 static struct omap_board_config_kernel zoom_config[] __initdata = {
 };
 
@@ -76,7 +70,7 @@ MACHINE_START(OMAP_ZOOM3, "OMAP Zoom3 board")
 	.phys_io	= ZOOM_UART_BASE,
 	.io_pg_offst	= (ZOOM_UART_VIRT >> 18) & 0xfffc,
 	.boot_params	= 0x80000100,
-	.map_io		= omap_zoom_map_io,
+	.map_io		= omap3_map_io,
 	.reserve	= omap_reserve,
 	.init_irq	= omap_zoom_init_irq,
 	.init_machine	= omap_zoom_init,