selftests/powerpc/dscr: Restore timeout to DSCR selftests

Reducing the time taken by dscr_sysfs_test.c allows restoring the
default timeout, which was removed in
commit 850507f3 ("selftests/powerpc: Turn off timeout setting for
benchmarks, dscr, signal, tm") because that test took too long.
Signed-off-by: Benjamin Gray <bgray@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230406043320.125138-8-bgray@linux.ibm.com

tools/testing/selftests/powerpc/dscr/Makefile

@@ -3,8 +3,6 @@ TEST_GEN_PROGS := dscr_default_test dscr_explicit_test dscr_user_test	\
 	      dscr_inherit_test dscr_inherit_exec_test dscr_sysfs_test	\
 	      dscr_sysfs_thread_test
 
-TEST_FILES := settings
-
 top_srcdir = ../../../../..
 include ../../lib.mk
 

tools/testing/selftests/powerpc/dscr/settings

-timeout=0