ARM: integrator: get rid of <mach/memory.h>

The Integrator has a custom <mach/memory.h> header defining the
BUS_OFFSET for *_to_bus and bus_to_* operations as offset from
0x80000000.

This switches the Integrator over to using the mechanism
introduced for the Keystone to provide the same offset using
the device tree, deletes <mach/memory.h> and augments the
Integrator device tree to provide the bus offset.

Cc: Grygorii Strashko <grygorii.strashko@ti.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Jonathan Austin <jonathan.austin@arm.com>
Cc: Russell King <linux@arm.linux.org.uk>
Acked-by: NSantosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

arch/arm/Kconfig

@@ -320,7 +320,6 @@ config ARCH_INTEGRATOR
 	select HAVE_TCM
 	select ICST
 	select MULTI_IRQ_HANDLER
-	select NEED_MACH_MEMORY_H
 	select PLAT_VERSATILE
 	select SPARSE_IRQ
 	select USE_OF

arch/arm/boot/dts/integratorap.dts

@@ -8,6 +8,7 @@
 / {
 	model = "ARM Integrator/AP";
 	compatible = "arm,integrator-ap";
+	dma-ranges = <0x80000000 0x0 0x80000000>;
 
 	aliases {
 		arm,timer-primary = &timer2;

arch/arm/mach-integrator/include/mach/memory.h

-/*
- *  arch/arm/mach-integrator/include/mach/memory.h
- *
- *  Copyright (C) 1999 ARM Limited
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- */
-#ifndef __ASM_ARCH_MEMORY_H
-#define __ASM_ARCH_MEMORY_H
-
-/*
- * Physical DRAM offset.
- */
-#define PLAT_PHYS_OFFSET	UL(0x00000000)
-
-#define BUS_OFFSET	UL(0x80000000)
-#define __virt_to_bus(x)	((x) - PAGE_OFFSET + BUS_OFFSET)
-#define __bus_to_virt(x)	((x) - BUS_OFFSET + PAGE_OFFSET)
-#define __pfn_to_bus(x)		(__pfn_to_phys(x) + (BUS_OFFSET - PHYS_OFFSET))
-#define __bus_to_pfn(x)		__phys_to_pfn((x) - (BUS_OFFSET - PHYS_OFFSET))
-
-#endif