Documentation/ABI: sysfs-driver-intel_sdsi: Fix sphinx warnings

Fix the following warnings from "make htmldocs":

Documentation/ABI/testing/sysfs-driver-intel_sdsi:2:
  WARNING: Unexpected indentation.
  WARNING: Block quote ends without a blank line; unexpected unindent.
  WARNING: Definition list ends without a blank line; unexpected unindent.

By turning the error-code table into a proper ReST table. While at it
also fix the error-code table mixing tab and spaces for indentation
(switch to all tabs).
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20220324164737.21765-2-hdegoede@redhat.com

Documentation/ABI/testing/sysfs-driver-intel_sdsi

@@ -13,8 +13,9 @@ Description:
 		Should the operation fail, one of the following error codes
 		may be returned:
 
+		==========	=====
 		Error Code	Cause
-	        ----------	-----
+		==========	=====
 		EIO		General mailbox failure. Log may indicate cause.
 		EBUSY		Mailbox is owned by another agent.
 		EPERM		SDSI capability is not enabled in hardware.
@@ -24,6 +25,7 @@ Description:
 				exceeds what may be written.
 		ESPIPE		Seeking is not allowed.
 		ETIMEDOUT	Failure to complete mailbox transaction in time.
+		==========	=====
 
 What:		/sys/bus/auxiliary/devices/intel_vsec.sdsi.X/guid
 Date:		Feb 2022