hw/i8042: Clean up data types

The i8042 is clearly an 8-bit era device, so there is little room for
32-bit registers.
Clean up the data types used.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Alexandru Elisei <alexandru.elisei@arm.com>
Link: https://lore.kernel.org/r/20210315153350.19988-6-andre.przywara@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
1 file changed