Major points of the update include:

   - Moved PCF2123 section in Kconfig to be inside the
     "if SPI_MASTER" blob, to take care of dependencies.

   - Changed udelay() to macro w/ comment, and shifted to
     using ndelay() instead due to 30 nsec requirement,
     not 30 usec as was originally coded.

   - Bypass delay if spi_*() commands fail.

Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>