davinci: omapl138-lcdk: remove unneeded includes

There's no SPI on da850-lcdk. Remove unnecessary includes.
Signed-off-by: NBartosz Golaszewski <bgolaszewski@baylibre.com>

board/davinci/da8xxevm/omapl138_lcdk.c

@@ -11,8 +11,6 @@
 #include <common.h>
 #include <i2c.h>
 #include <net.h>
-#include <spi.h>
-#include <spi_flash.h>
 #include <asm/arch/hardware.h>
 #include <asm/ti-common/davinci_nand.h>
 #include <asm/io.h>