hw/hppa/dino: Fix bitmask for the PCIROR register

Only 24 bits of the PCIROR register are documented
(see pp. 37 of datasheet referenced in this file header).

Acked-by: Helge Deller <deller@gmx.de>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20200218063355.18577-4-f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
diff --git a/hw/hppa/dino.c b/hw/hppa/dino.c
index 8868e31..be799aa 100644
--- a/hw/hppa/dino.c
+++ b/hw/hppa/dino.c
@@ -94,7 +94,7 @@
     MAKE_64BIT_MASK(0, 32), /* Undefined */
     MAKE_64BIT_MASK(0, 8),  /* MLTIM */
     MAKE_64BIT_MASK(0, 30), /* BRDG_FEAT */
-    MAKE_64BIT_MASK(0, 25), /* PCIROR */
+    MAKE_64BIT_MASK(0, 24), /* PCIROR */
     MAKE_64BIT_MASK(0, 22), /* PCIWOR */
     MAKE_64BIT_MASK(0, 32), /* Undocumented */
     MAKE_64BIT_MASK(0, 9),  /* TLTIM */