ia64: make num_rsvd_regions static

Commit f62800992e ("ia64: switch to NO_BOOTMEM") removed the last
user of num_rsvd_regions outside arch/ia64/kernel/setup.c.

Link: https://lkml.kernel.org/r/a377b5437e3e9da93d02f996fe06a2b956cb0990.1629884459.git.geert+renesas@glider.be
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Frank Rowand <frowand.list@gmail.com>
Cc: Jay Lan <jlan@sgi.com>
Cc: Magnus Damm <magnus.damm@gmail.com>
Cc: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Simon Horman <horms@verge.net.au>
Cc: Tony Luck <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/ia64/include/asm/meminit.h

@@ -29,7 +29,6 @@ struct rsvd_region {
 };
 
 extern struct rsvd_region rsvd_region[IA64_MAX_RSVD_REGIONS + 1];
-extern int num_rsvd_regions;
 
 extern void find_memory (void);
 extern void reserve_memory (void);

arch/ia64/kernel/setup.c

@@ -131,7 +131,7 @@ unsigned long ia64_cache_stride_shift = ~0;
  * We use a special marker for the end of memory and it uses the extra (+1) slot
  */
 struct rsvd_region rsvd_region[IA64_MAX_RSVD_REGIONS + 1] __initdata;
-int num_rsvd_regions __initdata;
+static int num_rsvd_regions __initdata;
 
 
 /*