hw/sparc: Mark devices as big-endian

These devices are only used by the SPARC targets, which are
only built as big-endian. Therefore the DEVICE_NATIVE_ENDIAN
definition expand to DEVICE_BIG_ENDIAN (besides, the
DEVICE_LITTLE_ENDIAN case isn't tested). Simplify directly
using DEVICE_BIG_ENDIAN.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20241106184612.71897-6-philmd@linaro.org>

hw/sparc/sun4m_iommu.c

@@ -238,7 +238,7 @@ static void iommu_mem_write(void *opaque, hwaddr addr,
 static const MemoryRegionOps iommu_mem_ops = {
     .read = iommu_mem_read,
     .write = iommu_mem_write,
-    .endianness = DEVICE_NATIVE_ENDIAN,
+    .endianness = DEVICE_BIG_ENDIAN,
     .valid = {
         .min_access_size = 4,
         .max_access_size = 4,

hw/sparc64/sun4u.c

@@ -254,7 +254,7 @@ static void power_mem_write(void *opaque, hwaddr addr,
 static const MemoryRegionOps power_mem_ops = {
     .read = power_mem_read,
     .write = power_mem_write,
-    .endianness = DEVICE_NATIVE_ENDIAN,
+    .endianness = DEVICE_BIG_ENDIAN,
     .valid = {
         .min_access_size = 4,
         .max_access_size = 4,