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This patch adds implementation for checking for SPI busy words - i.e. honoring a delay request from the WLAN chipset upon reading registers/memory. To optimized the average SPI ready by 32 bits, also configure the number of busywords to one to disable the "fixed-busy-word" functionality. Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com> Reviewed-by: Vidhya Govindan <vidhya.govindan@nokia.com> Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>