Enable spidev on beaglebone black

In kernel/arch/arm/mach-omap2/board-am335xevm.c

Change .modalias value to spidev in spi_board_info structure for spi0 or api1.

In kernel/arch/arm/configs/am335x_evm_android_defconfig

Comment out CONFIG_SPI_SPIDEV =y

Compile kernel and filesystem