This patch allows to read the REV_ID register in SPI mode and consequently
to properly detect the max3109. Indeed in SPI mode, this register is only
accessible by using indirect addressing.
Signed-off-by: NGregory Hermant <gregory.hermant@calao-systems.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>