firmware_abi: move to include/hw/nvram/

firmware_abi.h with structs for OpenBIOS landed in hw/sparc/ by mistake
- move it to hw/nvram/ alongside fw_cfg.h.  In addition to sparc it's
included from ppc mac_nvram.c and will need to include it from prep.c in
the future.
Acked-by: NAndreas Färber <afaerber@suse.de>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

hw/nvram/mac_nvram.c

@@ -23,7 +23,7 @@
  * THE SOFTWARE.
  */
 #include "hw/hw.h"
-#include "hw/sparc/firmware_abi.h"
+#include "hw/nvram/openbios_firmware_abi.h"
 #include "sysemu/sysemu.h"
 #include "hw/ppc/mac.h"
 

hw/sparc/sun4m.c

@@ -30,7 +30,7 @@
 #include "sysemu/sysemu.h"
 #include "net/net.h"
 #include "hw/boards.h"
-#include "hw/sparc/firmware_abi.h"
+#include "hw/nvram/openbios_firmware_abi.h"
 #include "hw/scsi/esp.h"
 #include "hw/i386/pc.h"
 #include "hw/isa/isa.h"

hw/sparc64/sun4u.c

@@ -32,7 +32,7 @@
 #include "qemu/timer.h"
 #include "sysemu/sysemu.h"
 #include "hw/boards.h"
-#include "hw/sparc/firmware_abi.h"
+#include "hw/nvram/openbios_firmware_abi.h"
 #include "hw/nvram/fw_cfg.h"
 #include "hw/sysbus.h"
 #include "hw/ide.h"