x86/setup: Move duplicate boot_cpu_data definition out of the ifdeffery

Both the if and else blocks define an exact same boot_cpu_data variable, move
the duplicate variable definition out of the if/else block.

In addition, do some other minor cleanups.

  [ bp: Massage. ]
Signed-off-by: Yuntao Wang <ytcoode@gmail.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20220601122914.820890-1-ytcoode@gmail.com

arch/x86/kernel/e820.c

@@ -395,7 +395,7 @@ int __init e820__update_table(struct e820_table *table)
 
 		/* Continue building up new map based on this information: */
 		if (current_type != last_type || e820_nomerge(current_type)) {
-			if (last_type != 0)	 {
+			if (last_type) {
 				new_entries[new_nr_entries].size = change_point[chg_idx]->addr - last_addr;
 				/* Move forward only if the new size was non-zero: */
 				if (new_entries[new_nr_entries].size != 0)
@@ -403,7 +403,7 @@ int __init e820__update_table(struct e820_table *table)
 					if (++new_nr_entries >= max_nr_entries)
 						break;
 			}
-			if (current_type != 0)	{
+			if (current_type) {
 				new_entries[new_nr_entries].addr = change_point[chg_idx]->addr;
 				new_entries[new_nr_entries].type = current_type;
 				last_addr = change_point[chg_idx]->addr;

arch/x86/kernel/setup.c

@@ -114,11 +114,6 @@ static struct resource bss_resource = {
 #ifdef CONFIG_X86_32
 /* CPU data as detected by the assembly code in head_32.S */
 struct cpuinfo_x86 new_cpu_data;
-
-/* Common CPU data for all CPUs */
-struct cpuinfo_x86 boot_cpu_data __read_mostly;
-EXPORT_SYMBOL(boot_cpu_data);
-
 unsigned int def_to_bigsmp;
 
 struct apm_info apm_info;
@@ -132,11 +127,10 @@ EXPORT_SYMBOL(ist_info);
 struct ist_info ist_info;
 #endif
 
-#else
-struct cpuinfo_x86 boot_cpu_data __read_mostly;
-EXPORT_SYMBOL(boot_cpu_data);
 #endif
 
+struct cpuinfo_x86 boot_cpu_data __read_mostly;
+EXPORT_SYMBOL(boot_cpu_data);
 
 #if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64)
 __visible unsigned long mmu_cr4_features __ro_after_init;