x86/setup: Remove unused RESERVE_BRK_ARRAY()

Since a13f2ef168cb ("x86/xen: remove 32-bit Xen PV guest support"),
RESERVE_BRK_ARRAY() has no user anymore so drop it.

Update related comments too.

Signed-off-by: Cao jin <[e-mail]>
Signed-off-by: Borislav Petkov <[e-mail]>
Link: https://lkml.kernel.org/r/[e-mail]

arch/x86/include/asm/setup.h

···
 			: : "i" (sz));					\
 	}
 
-/* Helper for reserving space for arrays of things */
-#define RESERVE_BRK_ARRAY(type, name, entries)		\
-	type *name;					\
-	RESERVE_BRK(name, sizeof(type) * entries)
-
 extern void probe_roms(void);
 #ifdef __i386__
 

arch/x86/kernel/setup.c

···
 
 /*
  * Range of the BSS area. The size of the BSS area is determined
- * at link time, with RESERVE_BRK*() facility reserving additional
+ * at link time, with RESERVE_BRK() facility reserving additional
  * chunks.
  */
 unsigned long _brk_start = (unsigned long)__brk_base;
···
 
 	/*
 	 * Need to conclude brk, before e820__memblock_setup()
-	 *  it could use memblock_find_in_range, could overlap with
-	 *  brk area.
+	 * it could use memblock_find_in_range, could overlap with
+	 * brk area.
 	 */
 	reserve_brk();