hw/sh_serial: Use TARGET_PRIxPHYS rather than %x for physaddr

Switch a format string from %x to TARGET_PRIxPHYS so that it will
continue to work even if target_phys_addr_t is changed
to 64 bits in the future.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>

hw/sh_serial.c

@@ -186,7 +186,8 @@ static void sh_serial_write(void *opaque, target_phys_addr_t offs,
         }
     }
 
-    fprintf(stderr, "sh_serial: unsupported write to 0x%02x\n", offs);
+    fprintf(stderr, "sh_serial: unsupported write to 0x%02"
+            TARGET_PRIxPHYS "\n", offs);
     abort();
 }
 
@@ -287,7 +288,8 @@ static uint64_t sh_serial_read(void *opaque, target_phys_addr_t offs,
 #endif
 
     if (ret & ~((1 << 16) - 1)) {
-        fprintf(stderr, "sh_serial: unsupported read from 0x%02x\n", offs);
+        fprintf(stderr, "sh_serial: unsupported read from 0x%02"
+                TARGET_PRIxPHYS "\n", offs);
         abort();
     }