ft2232_spi.c: use constants from ftdi.h instead of magic numbers

Also, improve documentation of static variables cs_bits and pindir.

Corresponding to flashrom svn r1872.

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
Acked-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
1 file changed