[PATCH V2 1/2] Documentation/features: Add na key to arch-support.txt

[Ananth N Mavinakayanahalli]

To be used for features we will not support on a particular architecture.
The git log that adds this needs to provide the justification 'why?'

Signed-off-by: Ananth N Mavinakayanahalli <ananth at in.ibm.com>
---
 Documentation/features/arch-support.txt |    1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/features/arch-support.txt b/Documentation/features/arch-support.txt
index d22a109..f2b272e 100644
--- a/Documentation/features/arch-support.txt
+++ b/Documentation/features/arch-support.txt
@@ -8,4 +8,5 @@ The meaning of entries in the tables is:
     | ok |  # feature supported by the architecture
     |TODO|  # feature not yet supported by the architecture
     | .. |  # feature cannot be supported by the hardware
+    | na |  # feature will not be supported by the architecture