ARM: pxa: Introduce pxa{25x,27x,3xx}_map_io()

This patch introduces pxa2xx_map_io() and pxa3xx_map_io() to distinguish
between PXA25x/PXA27x and PXA3xx memory mapping.

Also, fixup for platforms broken after introducing pxa{25x,27x}_map_io()
and pxa3xx_map_io() is included.

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
diff --git a/arch/arm/mach-pxa/saar.c b/arch/arm/mach-pxa/saar.c
index ffa50e6..c1ca8cb 100644
--- a/arch/arm/mach-pxa/saar.c
+++ b/arch/arm/mach-pxa/saar.c
@@ -597,7 +597,7 @@
 MACHINE_START(SAAR, "PXA930 Handheld Platform (aka SAAR)")
 	/* Maintainer: Eric Miao <eric.miao@marvell.com> */
 	.boot_params    = 0xa0000100,
-	.map_io         = pxa_map_io,
+	.map_io         = pxa3xx_map_io,
 	.init_irq       = pxa3xx_init_irq,
 	.timer          = &pxa_timer,
 	.init_machine   = saar_init,