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/include/asm-x86/e820.h b/include/asm-x86/e820.h
index a5959e3..6b0ce74 100644
--- a/include/asm-x86/e820.h
+++ b/include/asm-x86/e820.h
@@ -60,12 +60,12 @@
 
 extern int e820_any_mapped(u64 start, u64 end, unsigned type);
 extern int e820_all_mapped(u64 start, u64 end, unsigned type);
-extern void add_memory_region(u64 start, u64 size, int type);
+extern void e820_add_region(u64 start, u64 size, int type);
 extern void e820_print_map(char *who);
 extern int
 sanitize_e820_map(struct e820entry *biosmap, int max_nr_map, int *pnr_map);
 extern int copy_e820_map(struct e820entry *biosmap, int nr_map);
-extern u64 update_memory_range(u64 start, u64 size, unsigned old_type,
+extern u64 e820_update_range(u64 start, u64 size, unsigned old_type,
 			       unsigned new_type);
 extern void update_e820(void);
 extern void e820_setup_gap(void);