x86: Rename e820entry to e820_entry

This changes 'struct e820entry' to 'struct e820_entry' to conform
with the coding style.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
diff --git a/arch/x86/cpu/tangier/sdram.c b/arch/x86/cpu/tangier/sdram.c
index daa9909..f5f412a 100644
--- a/arch/x86/cpu/tangier/sdram.c
+++ b/arch/x86/cpu/tangier/sdram.c
@@ -100,7 +100,7 @@
 	     i++, mentry++)						\
 
 static unsigned int sfi_setup_e820(unsigned int max_entries,
-				   struct e820entry *entries)
+				   struct e820_entry *entries)
 {
 	struct sfi_table_simple *sb;
 	struct sfi_mem_entry *mentry;
@@ -190,7 +190,7 @@
 }
 
 unsigned int install_e820_map(unsigned int max_entries,
-			      struct e820entry *entries)
+			      struct e820_entry *entries)
 {
 	return sfi_setup_e820(max_entries, entries);
 }