selftests/zram: Makefile fix

Do not override run_tests, The default rule will just run TEST_PROGS
Signed-off-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

tools/testing/selftests/zram/Makefile

@@ -5,8 +5,5 @@ TEST_FILES := zram01.sh zram02.sh zram_lib.sh
 
 include ../lib.mk
 
-run_tests:
-	@/bin/bash ./zram.sh
-
 clean:
 	$(RM) err.log