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>
diff --git a/arch/x86/kernel/crash.c b/arch/x86/kernel/crash.c
index 60c0185..81b67df 100644
--- a/arch/x86/kernel/crash.c
+++ b/arch/x86/kernel/crash.c
@@ -504,7 +504,7 @@ static int prepare_elf_headers(struct kimage *image, void **addr,
 	return ret;
 }
 
-static int add_e820_entry(struct boot_params *params, struct e820entry *entry)
+static int add_e820_entry(struct boot_params *params, struct e820_entry *entry)
 {
 	unsigned int nr_e820_entries;
 
@@ -513,7 +513,7 @@ static int add_e820_entry(struct boot_params *params, struct e820entry *entry)
 		return 1;
 
 	memcpy(&params->e820_map[nr_e820_entries], entry,
-			sizeof(struct e820entry));
+			sizeof(struct e820_entry));
 	params->e820_entries++;
 	return 0;
 }
@@ -522,7 +522,7 @@ static int memmap_entry_callback(u64 start, u64 end, void *arg)
 {
 	struct crash_memmap_data *cmd = arg;
 	struct boot_params *params = cmd->params;
-	struct e820entry ei;
+	struct e820_entry ei;
 
 	ei.addr = start;
 	ei.size = end - start + 1;
@@ -561,7 +561,7 @@ int crash_setup_memmap_entries(struct kimage *image, struct boot_params *params)
 {
 	int i, ret = 0;
 	unsigned long flags;
-	struct e820entry ei;
+	struct e820_entry ei;
 	struct crash_memmap_data cmd;
 	struct crash_mem *cmem;