spi: Respect DataBitLength field of SpiSerialBusV2() ACPI resource

spi: Respect DataBitLength field of SpiSerialBusV2() ACPI resource

[ Upstream commit 0dadde344d965566589cd82797893d5aa06557a3 ]

By unknown reason the commit 64bee4d28c9e
  ("spi / ACPI: add ACPI enumeration support")
missed the DataBitLength property to encounter when parse SPI slave
device data from ACPI.

Fill the gap here.

Fixes: 64bee4d28c9e ("spi / ACPI: add ACPI enumeration support")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20200413180406.1826-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>