064-gtp-channel: fix width of [TR]XOUT_DIV attributes

Signed-off-by: Alessandro Comodi <acomodi@antmicro.com>

fuzzers/064-gtp-channel-conf/attrs.json

diff --git a/fuzzers/064-gtp-channel-conf/attrs.json b/fuzzers/064-gtp-channel-conf/attrs.json
index f852a25..6c1e022 100644
--- a/fuzzers/064-gtp-channel-conf/attrs.json
+++ b/fuzzers/064-gtp-channel-conf/attrs.json
@@ -904,13 +904,13 @@
         "type": "INT",
         "values": [1, 2, 4, 8],
         "encoding": [0, 1, 2, 3],
-        "digits": 3
+        "digits": 2
     },
     "RXOUT_DIV": {
         "type": "INT",
         "values": [1, 2, 4, 8],
         "encoding": [0, 1, 2, 3],
-        "digits": 3
+        "digits": 2
     },
     "CFOK_CFG": {
         "type": "BIN",