zephyr: emul: ps8xxx: Fix i2c_emul_register call
zephyr: emul: ps8xxx: Fix i2c_emul_register call

The i2c_emul_register() function now takes only two arguments, starting
from commit 59d9193df17f2de8e7dd075823c524183bf6f0de in the zephyr
repository. PS8xxx emulator has to be aligned to new API.

BUG=None
TEST=./twister -T zephyr/test/drivers
BRANCH=None

Signed-off-by: Tomasz Michalec <a547db31280d14f095c760a23a7523d0b1e55fe6@semihalf.com>
Change-Id: I074e747ae3efb72f2ebf8bc5aa38f65fcf5cffb0
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3810442
Tested-by: Tomasz Michalec <c064a6042954d4ba0805003dc021b76413ff1548@google.com>
Code-Coverage: Zoss <345cf107e82c70959d46f59d98bddc98ce458aff@prod.google.com>
Commit-Queue: Fabio Baltieri <1c55e39c05d9ab42261288cf330256b2af6ba179@google.com>
Reviewed-by: Fabio Baltieri <1c55e39c05d9ab42261288cf330256b2af6ba179@google.com>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec