spi: add spi_ppc4xx driver

This adds a SPI driver for the SPI controller found in the IBM/AMCC
4xx PowerPC's.

Signed-off-by: Stefan Roese <[email protected]>
Signed-off-by: Wolfgang Ocker <[email protected]>
Acked-by: Josh Boyer <[email protected]>
Signed-off-by: Steven A. Falco <[email protected]>
Signed-off-by: David Brownell <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
3 files changed