Revert "ARM: ixp4xx: Make dma_set_coherent_mask common, correct implementation"

This reverts commit bfdad565.

The patch turned out to be incorrect, and will be replaced
with a correct patch.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/mach-ixp4xx/common-pci.c

@@ -481,5 +481,14 @@ int ixp4xx_setup(int nr, struct pci_sys_data *sys)
 	return 1;
 }
 
+int dma_set_coherent_mask(struct device *dev, u64 mask)
+{
+	if (mask >= SZ_64M - 1)
+		return 0;
+
+	return -EIO;
+}
+
 EXPORT_SYMBOL(ixp4xx_pci_read);
 EXPORT_SYMBOL(ixp4xx_pci_write);
+EXPORT_SYMBOL(dma_set_coherent_mask);

arch/arm/mach-ixp4xx/common.c

@@ -31,7 +31,6 @@
 #include <linux/gpio.h>
 #include <linux/cpu.h>
 #include <linux/sched_clock.h>
-#include <linux/pci.h>
 
 #include <mach/udc.h>
 #include <mach/hardware.h>
@@ -579,17 +578,6 @@ void ixp4xx_restart(enum reboot_mode mode, const char *cmd)
 	}
 }
 
-int dma_set_coherent_mask(struct device *dev, u64 mask)
-{
-	if (dev_is_pci(dev) && mask >= SZ_64M)
-		return -EIO;
-
-	dev->coherent_dma_mask = mask;
-
-	return 0;
-}
-EXPORT_SYMBOL(dma_set_coherent_mask);
-
 #ifdef CONFIG_IXP4XX_INDIRECT_PCI
 /*
  * In the case of using indirect PCI, we simply return the actual PCI