Protect ARRAY_SIZE macro from being #defined twice
Protect ARRAY_SIZE macro from being #defined twice

BUG=chrome-os-partner:7459
TEST=none

Change-Id: I3664ad9db4a4e0cecd38443bf01f99531ba80972
Reviewed-on: https://gerrit.chromium.org/gerrit/22183
Commit-Ready: Bill Richardson <129945214b1d548d8e49b6c29c43094f8c78057f@chromium.org>
Tested-by: Bill Richardson <129945214b1d548d8e49b6c29c43094f8c78057f@chromium.org>
Reviewed-by: Randall Spangler <62698fdbb84d1779579ee80c3f39fac22017e5bc@chromium.org>

ionave/seismograph,geekboxzone/mmallow_external_vboot_reference,ccaapton/vboot_reference,coreboot/vboot,acorn-marvell/vboot_reference,acorn-marvell/vboot_reference,marineam/seismograph,coreboot/vboot,marineam/seismograph,ionave/seismograph,acorn-marvell/vboot_reference,ccaapton/vboot_reference,geekboxzone/mmallow_external_vboot_reference,geekboxzone/mmallow_external_vboot_reference,marineam/seismograph,coreboot/vboot,ccaapton/vboot_reference,ionave/seismograph,coreboot/vboot,geekboxzone/mmallow_external_vboot_reference,geekboxzone/mmallow_external_vboot_reference,acorn-marvell/vboot_reference,coreboot/vboot,ccaapton/vboot_reference,marineam/seismograph