target/xtensa: tests: fix memctl SR test

memctl SR is not available on dc232b, as it was introduced in more
recent hardware release. Now that this information is available through
the libisa the test fails. Fix the test.
Signed-off-by: NMax Filippov <jcmvbkbc@gmail.com>

tests/tcg/xtensa/test_sr.S

@@ -44,7 +44,6 @@ test_end
 
 test_sr acchi, 1
 test_sr acclo, 1
-test_sr /*memctl*/97, 0
 test_sr_mask /*atomctl*/99, 0, 0
 test_sr_mask /*br*/4, 0, 0
 test_sr_mask /*cacheattr*/98, 0, 0
@@ -76,6 +75,7 @@ test_sr lcount, 1
 test_sr lend, 1
 test_sr litbase, 1
 test_sr m0, 1
+test_sr_mask /*memctl*/97, 0, 0
 test_sr misc0, 1
 test_sr_mask /*prefctl*/40, 0, 0
 test_sr_mask /*prid*/235, 0, 1