x86: rename two e820 related functions

rename update_memory_range to e820_update_range
rename add_memory_region to e820_add_region

to make it more clear that they are about e820 map operations.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/mach-voyager/setup.c b/arch/x86/mach-voyager/setup.c
index f4aca9f..f27b583 100644
--- a/arch/x86/mach-voyager/setup.c
+++ b/arch/x86/mach-voyager/setup.c
@@ -74,7 +74,7 @@
 
 		e820.nr_map = 0;
 		for (i = 0; voyager_memory_detect(i, &addr, &length); i++) {
-			add_memory_region(addr, length, E820_RAM);
+			e820_add_region(addr, length, E820_RAM);
 		}
 		return who;
 	} else if (voyager_level == 4) {
@@ -92,14 +92,14 @@
 			tom = (boot_params.screen_info.ext_mem_k) << 10;
 		}
 		who = "Voyager-TOM";
-		add_memory_region(0, 0x9f000, E820_RAM);
+		e820_add_region(0, 0x9f000, E820_RAM);
 		/* map from 1M to top of memory */
-		add_memory_region(1 * 1024 * 1024, tom - 1 * 1024 * 1024,
+		e820_add_region(1 * 1024 * 1024, tom - 1 * 1024 * 1024,
 				  E820_RAM);
 		/* FIXME: Should check the ASICs to see if I need to
 		 * take out the 8M window.  Just do it at the moment
 		 * */
-		add_memory_region(8 * 1024 * 1024, 8 * 1024 * 1024,
+		e820_add_region(8 * 1024 * 1024, 8 * 1024 * 1024,
 				  E820_RESERVED);
 		return who;
 	}
@@ -131,8 +131,8 @@
 		}
 
 		e820.nr_map = 0;
-		add_memory_region(0, LOWMEMSIZE(), E820_RAM);
-		add_memory_region(HIGH_MEMORY, mem_size << 10, E820_RAM);
+		e820_add_region(0, LOWMEMSIZE(), E820_RAM);
+		e820_add_region(HIGH_MEMORY, mem_size << 10, E820_RAM);
 	}
 	return who;
 }