editorial update

src/iommu_data_structures.adoc

@@ -199,8 +199,6 @@ image::ddt-base.svg[width=800,height=400, align="center"]
 //ddtp--->+--+ +->+--+ +->+--+  ddtp--->+--+ +->+--+  ddtp--->+--+
 //....
 
-<<<
-
 ==== Non-leaf DDT entry
 
 A valid (`V==1`) non-leaf DDT entry provides the PPN of the next level DDT.
@@ -448,10 +446,10 @@ encodings are as follows:
 [[IOHGATP_MODE_ENC]]
 .Encodings of `iohgatp.MODE` field
 [%autowidth,float="center",align="center"]
-[%header, cols="3,3,20"]
+[%header, cols="^3,^3,20"]
 |===
 3+^|               `fctl.GXL=0`
-|Value | Name     | Description
+^|Value ^| Name     ^| Description
 | 0    | `Bare`   | No translation or protection.
 | 1-7  | --       | Reserved for standard use.
 | 8    | `Sv39x4` | Page-based 41-bit virtual addressing (2-bit extension
@@ -553,10 +551,10 @@ address.
 [[IOSATP_MODE_ENC]]
 .Encodings of `iosatp.MODE` field
 [%autowidth,float="center",align="center"]
-[%header, cols="3,3,20"]
+[%header, cols="^3,^3,20"]
 |===
 3+^|               `DC.tc.SXL=0`
-|Value | Name     | Description
+^|Value ^| Name     ^| Description
 | 0    | `Bare`   | No translation or protection.
 | 1-7  | --       | Reserved for standard use.
 | 8    | `Sv39`   | Page-based 39-bit virtual addressing.
@@ -603,7 +601,7 @@ first-stage page table with a `process_id`.
 [%autowidth,float="center",align="center"]
 [%header, cols="^3,^3,20"]
 |===
-|Value | Name     | Description
+^|Value ^| Name     ^| Description
 | 0    | `Bare`   | No first-stage address translation or protection.
 | 1    | `PD8`    | 8-bit process ID enabled. The directory has 1 levels with
                     256 entries.The bits 19:8 of `process_id` must be 0.
@@ -639,7 +637,7 @@ The `msiptp.MODE` field is used to select the MSI address translation scheme.
 [%autowidth,float="center",align="center"]
 [%header, cols="^3,^3,20"]
 |===
-|Value | Name     | Description
+^|Value ^| Name     ^| Description
 | 0    | `Off`    | Recognition of accesses to
                     a virtual interrupt file using MSI address mask and
                     pattern is not performed.
@@ -1463,7 +1461,7 @@ group of entries.
 [%autowidth,float="center",align="center"]
 [%header, cols="8,10,10"]
 |===
-|Data Structure cached  |IDs used to tag entries    | Invalidation command
+^|Data Structure cached  ^|IDs used to tag entries    ^| Invalidation command
 |Device Directory Table |`device_id`                | <<IDDT, IODIR.INVAL_DDT>>
 |Process Directory Table|`device_id`, `process_id`  | <<IPDT, IODIR.INVAL_PDT>>
 |First-stage page table