agp: kill phys_to_gart() and gart_to_phys()

There seems to be no reason for these -- they're a 1:1 mapping on all
platforms.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
diff --git a/drivers/char/agp/efficeon-agp.c b/drivers/char/agp/efficeon-agp.c
index 35d50f2..793f39e 100644
--- a/drivers/char/agp/efficeon-agp.c
+++ b/drivers/char/agp/efficeon-agp.c
@@ -67,7 +67,7 @@
 /* This function does the same thing as mask_memory() for this chipset... */
 static inline unsigned long efficeon_mask_memory(struct page *page)
 {
-	unsigned long addr = phys_to_gart(page_to_phys(page));
+	unsigned long addr = page_to_phys(page);
 	return addr | 0x00000001;
 }
 
@@ -226,7 +226,7 @@
 
 		efficeon_private.l1_table[index] = page;
 
-		value = virt_to_gart((unsigned long *)page) | pati | present | index;
+		value = virt_to_phys((unsigned long *)page) | pati | present | index;
 
 		pci_write_config_dword(agp_bridge->dev,
 			EFFICEON_ATTPAGE, value);