[kmac] Revise CFG to be read-only in HW
This commit is to fix the CFG register behavior. It was external and
`hrw` type for HW to direct control the write permission. After
utilizing REGWEN feature, it doesn't have to be write-able from HW view.
The permission was remained and caused the unknown value to kmac_en and
rest of the values, which creates an error on FPV.
Signed-off-by: Eunchan Kim <eunchan@opentitan.org>
diff --git a/hw/ip/kmac/data/kmac.hjson b/hw/ip/kmac/data/kmac.hjson
index c731698..b0971b4 100644
--- a/hw/ip/kmac/data/kmac.hjson
+++ b/hw/ip/kmac/data/kmac.hjson
@@ -69,7 +69,7 @@
'''
regwen: "CFG_REGWEN"
swaccess: "rw"
- hwaccess: "hrw"
+ hwaccess: "hro"
fields: [
{ bits: "0"
name: "kmac_en"
