spi: pl022: Rename flush into pl022_spi_flush

Rename the flush function into pl022_spi_flush to avoid conflicting
types with previous declaration of the function in stdio.h header.

Signed-off-by: Stefan Herbrechtsmeier <stefan.herbrechtsmeier@weidmueller.com>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
1 file changed