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>

selftests: sparc64: char: Selftest for privileged ADI driver

Add a selftest for the sparc64 privileged ADI driver. These
tests verify the read(), pread(), write(), pwrite(), and seek()
functionality of the driver. The tests also report simple
performance statistics:

Syscall Call AvgTime AvgSize
Count (ticks) (bytes)
-------------------------------
read 3 119638 8133
pread 4 118164 6741
write 3 339442 8133
pwrite 4 280134 6741
seek 10 2919 0
Pass 8 Fail 0 Xfail 0 Xpass 0 Skip 0 Error 0

Signed-off-by: Tom Hromatka <tom.hromatka@oracle.com>
Reviewed-by: Allen Pais <allen.pais@oracle.com>
Reviewed-by: Shuah Khan (Samsung OSG) <shuah@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>