mfd: Mark WM8350 mask revision as readable to match silicon

No impact unless someone has written additional kernel code.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

drivers/mfd/wm8350-regmap.c

@@ -3186,7 +3186,7 @@ const struct wm8350_reg_access wm8350_reg_io_map[] = {
 	/*  read    write volatile */
 	{ 0xFFFF, 0xFFFF, 0xFFFF }, /* R0   - Reset/ID */
 	{ 0x7CFF, 0x0C00, 0x7FFF }, /* R1   - ID */
-	{ 0x0000, 0x0000, 0x0000 }, /* R2 */
+	{ 0x007F, 0x0000, 0x0000 }, /* R2   - ROM Mask ID */
 	{ 0xBE3B, 0xBE3B, 0x8000 }, /* R3   - System Control 1 */
 	{ 0xFEF7, 0xFEF7, 0xF800 }, /* R4   - System Control 2 */
 	{ 0x80FF, 0x80FF, 0x8000 }, /* R5   - System Hibernate */