hw/misc/pvpanic: Expose MMIO interface as little-endian

Make the PVPanic MMIO interface behave like the ISA and PCI
variants: access it using little endianness.

Fixes: a89607c4d0 ("hw/misc/pvpanic: Add MMIO interface")
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Message-Id: <20251224134644.85582-5-philmd@linaro.org>

hw/misc/pvpanic.c

@@ -62,6 +62,7 @@ static void pvpanic_write(void *opaque, hwaddr addr, uint64_t val,
 }
 
 static const MemoryRegionOps pvpanic_ops = {
+    .endianness = DEVICE_LITTLE_ENDIAN,
     .read = pvpanic_read,
     .write = pvpanic_write,
     .impl = {