[POWERPC] Squash build warning for print of resource_size_t in fsl_soc.c

When resource_size_t is larger than an int, the current code
generates a build warning.  Kill it.

Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/arch/powerpc/sysdev/fsl_soc.c b/arch/powerpc/sysdev/fsl_soc.c
index 7b45670..b594087 100644
--- a/arch/powerpc/sysdev/fsl_soc.c
+++ b/arch/powerpc/sysdev/fsl_soc.c
@@ -389,8 +389,8 @@
 			}
 
 			gfar_data.phy_id = *id;
-			snprintf(gfar_data.bus_id, MII_BUS_ID_SIZE, "%x",
-					res.start);
+			snprintf(gfar_data.bus_id, MII_BUS_ID_SIZE, "%llx",
+				 (unsigned long long)res.start);
 
 			of_node_put(phy);
 			of_node_put(mdio);