Change some ARM subtarget features to be single bit yes/no in order to sink them down to MC layer. Also fix tests.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134590 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/ARM/prefetch.ll b/test/CodeGen/ARM/prefetch.ll
index 250a34e..9c8ff2b 100644
--- a/test/CodeGen/ARM/prefetch.ll
+++ b/test/CodeGen/ARM/prefetch.ll
@@ -1,6 +1,6 @@
 ; RUN: llc < %s -march=thumb -mattr=-thumb2 | not grep pld
-; RUN: llc < %s -march=thumb -mattr=+v7a        | FileCheck %s -check-prefix=THUMB2
-; RUN: llc < %s -march=arm   -mattr=+v7a        | FileCheck %s -check-prefix=ARM
+; RUN: llc < %s -march=thumb -mattr=+v7         | FileCheck %s -check-prefix=THUMB2
+; RUN: llc < %s -march=arm   -mattr=+v7         | FileCheck %s -check-prefix=ARM
 ; RUN: llc < %s -march=arm   -mcpu=cortex-a9-mp | FileCheck %s -check-prefix=ARM-MP
 ; rdar://8601536