hw/arm/armv7m: Clean up local variable shadowing

hw/arm/armv7m: Clean up local variable shadowing

Fix:

  hw/arm/armv7m.c: In function ‘armv7m_realize’:
  hw/arm/armv7m.c:520:27: warning: declaration of ‘sbd’ shadows a previous local [-Wshadow=compatible-local]
    520 |             SysBusDevice *sbd = SYS_BUS_DEVICE(&s->bitband[i]);
        |                           ^~~
  hw/arm/armv7m.c:278:19: note: shadowed declaration is here
    278 |     SysBusDevice *sbd;
        |                   ^~~
       ---

  hw/arm/armsse.c: In function ‘armsse_realize’:
  hw/arm/armsse.c:1471:27: warning: declaration of ‘mr’ shadows a previous local [-Wshadow=compatible-local]
   1471 |             MemoryRegion *mr;
        |                           ^~
  hw/arm/armsse.c:917:19: note: shadowed declaration is here
    917 |     MemoryRegion *mr;
        |                   ^~
       ---

  hw/arm/armsse.c:1608:22: warning: declaration of ‘dev_splitter’ shadows a previous local [-Wshadow=compatible-local]
   1608 |         DeviceState *dev_splitter = DEVICE(splitter);
        |                      ^~~~~~~~~~~~
  hw/arm/armsse.c:923:18: note: shadowed declaration is here
    923 |     DeviceState *dev_splitter;
        |                  ^~~~~~~~~~~~

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20230904161235.84651-8-philmd@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Markus Armbruster <armbru@redhat.com>