x86/boot/e820: Rename the basic e820 data types to 'struct e820_entry' and 'struct e820_array'

The 'e820entry' and 'e820map' names have various annoyances:

 - the missing underscore departs from the usual kernel style
   and makes the code look weird,

 - in the past I kept confusing the 'map' with the 'entry', because
   a 'map' is ambiguous in that regard,

 - it's not really clear from the 'e820map' that this is a regular
   C array.

Rename them to 'struct e820_entry' and 'struct e820_array' accordingly.

( Leave the legacy UAPI header alone but do the rename in the bootparam.h
  and e820/types.h file - outside tools relying on these defines should
  either adjust their code, or should use the legacy header, or should
  create their private copies for the definitions. )

No change in functionality.

Cc: Alex Thorlton <athorlton@sgi.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Huang, Ying <ying.huang@intel.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul Jackson <pj@sgi.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Tejun Heo <tj@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Wei Yang <richard.weiyang@gmail.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

arch/x86/power/hibernate_64.c

@@ -201,7 +201,7 @@ struct restore_data_record {
  * @map: the e820 map to be calculated
  * @buf: the md5 result to be stored to
  */
-static int get_e820_md5(struct e820map *map, void *buf)
+static int get_e820_md5(struct e820_array *map, void *buf)
 {
 	struct scatterlist sg;
 	struct crypto_ahash *tfm;
@@ -214,8 +214,8 @@ static int get_e820_md5(struct e820map *map, void *buf)
 
 	{
 		AHASH_REQUEST_ON_STACK(req, tfm);
-		size = offsetof(struct e820map, map)
-			+ sizeof(struct e820entry) * map->nr_map;
+		size = offsetof(struct e820_array, map)
+			+ sizeof(struct e820_entry) * map->nr_map;
 		ahash_request_set_tfm(req, tfm);
 		sg_init_one(&sg, (u8 *)map, size);
 		ahash_request_set_callback(req, 0, NULL, NULL);