selftests/sparc64: remove ARRAY_SIZE define from adi-test

ARRAY_SIZE is defined in several selftests. Remove definition from
individual test files and include header file for the define instead.
ARRAY_SIZE define is added in a separate patch to prepare for this
change.

Remove ARRAY_SIZE from adi-test and pickup the one defined in
kselftest.h.
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

tools/testing/selftests/sparc64/drivers/adi-test.c

@@ -24,10 +24,6 @@
 #define DEBUG_LEVEL_4_BIT	(0x0008)
 #define DEBUG_TIMING_BIT	(0x1000)
 
-#ifndef ARRAY_SIZE
-# define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
-#endif
-
 /* bit mask of enabled bits to print */
 #define DEBUG 0x0001