x86: move a declaration to header

Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

hw/pc.c

@@ -456,8 +456,6 @@ static void bochs_bios_write(void *opaque, uint32_t addr, uint32_t val)
     }
 }
 
-extern uint64_t node_cpumask[MAX_NODES];
-
 static void *bochs_bios_init(void)
 {
     void *fw_cfg;

sysemu.h

@@ -138,6 +138,7 @@ extern int boot_menu;
 #define MAX_NODES 64
 extern int nb_numa_nodes;
 extern uint64_t node_mem[MAX_NODES];
+extern uint64_t node_cpumask[MAX_NODES];
 
 #define MAX_OPTION_ROMS 16
 extern const char *option_rom[MAX_OPTION_ROMS];