agp/intel-gtt: move gart base addres setup

We need this thing much earlier, and it doesn't make sense
in the hw enabling function intel_enable_gtt - this does not
change over a suspend/resume cycle ...
Reviewed-by: Jani Nikula <jani.nikula@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/char/agp/intel-gtt.c

@@ -648,6 +648,7 @@ static void intel_gtt_cleanup(void)
 
 static int intel_gtt_init(void)
 {
+	u32 gma_addr;
 	u32 gtt_map_size;
 	int ret;
 
@@ -694,6 +695,15 @@ static int intel_gtt_init(void)
 		return ret;
 	}
 
+	if (INTEL_GTT_GEN <= 2)
+		pci_read_config_dword(intel_private.pcidev, I810_GMADDR,
+				      &gma_addr);
+	else
+		pci_read_config_dword(intel_private.pcidev, I915_GMADDR,
+				      &gma_addr);
+
+	intel_private.base.gma_bus_addr = (gma_addr & PCI_BASE_ADDRESS_MEM_MASK);
+
 	return 0;
 }
 
@@ -769,18 +779,8 @@ static void i830_write_entry(dma_addr_t addr, unsigned int entry,
 
 static bool intel_enable_gtt(void)
 {
-	u32 gma_addr;
 	u8 __iomem *reg;
 
-	if (INTEL_GTT_GEN <= 2)
-		pci_read_config_dword(intel_private.pcidev, I810_GMADDR,
-				      &gma_addr);
-	else
-		pci_read_config_dword(intel_private.pcidev, I915_GMADDR,
-				      &gma_addr);
-
-	intel_private.base.gma_bus_addr = (gma_addr & PCI_BASE_ADDRESS_MEM_MASK);
-
 	if (INTEL_GTT_GEN >= 6)
 	    return true;