rk3288: remove unused structs and declarations

The struct rockchip_spi_media type is no longer used;
nor is initialize_rockchip_spi_cbfs_media(). Remove them.

Change-Id: I2c24be249e0cd89e2dd328e05cdd24a178fe37e8
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/10214
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

src/soc/rockchip/rk3288/include/soc/spi.h

@@ -21,7 +21,6 @@
 #define __SOC_ROCKCHIP_RK3288_SPI_H__
 
 /* This driver serves as a CBFS media source. */
-#include <cbfs.h>
 #include <spi-generic.h>
 #include <stdint.h>
 
@@ -195,10 +194,6 @@ check_member(rockchip_spi, rxdr, 0x800);
 #define SPI_CLEAR_INT_RXOI	(1 << 2)
 #define SPI_CLEAR_INT_TXOI	(1 << 3)
 
-/* Serve as CBFS media source */
-int initialize_rockchip_spi_cbfs_media(struct cbfs_media *media,
-				     void *buffer_address,
-				     size_t buffer_size);
 void rockchip_spi_init(unsigned int bus, unsigned int speed_hz);
 
 #endif

src/soc/rockchip/rk3288/spi.c

@@ -288,8 +288,3 @@ int spi_xfer(struct spi_slave *slave, const void *dout,
 	rockchip_spi_enable_chip(regs, 0);
 	return ret < 0 ? ret : 0;
 }
-
-struct rockchip_spi_media {
-	struct spi_slave *slave;
-	struct cbfs_simple_buffer buffer;
-};