fix table formatting

Author: tariqkurd-repo

src/insns/acperm_32bit.adoc

@@ -39,7 +39,7 @@ The rules from <<acperm_rules>> must be followed when removing permissions.
 
 [#acperm_rules]
 .ACPERM common rules
-[%autowidth,float="center",align="center",cols="3,3,3",options="header"]
+[float="center",align="center",cols="2,2,3",options="header"]
 |===
 | Rule            | Permission   | Only valid if
 |  1  (RV32 only) | <<asr_perm>> | All other permissions are set.