u-boot/doc/SPI/README.altera_spi

SoCFPGA EPCS/EPCQx1 mini howto:
- Instantiate EPCS/EPCQx1 Serial flash controller in QSys and rebuild
- The controller base address is the "Base" in QSys + 0x400
- Set MSEL[4:0]=10010 (AS Standard)
- Load the bitstream into FPGA, enable bridges
- Only then will the driver work
spi: altera: Add short note about EPCS/EPCQx1 Add short documentation-alike note on how to use the Altera SPI driver with the EPCS/EPCQx1 FPGA IP block on SoCFPGA Cyclone V into doc/SPI/README.altera_spi Signed-off-by: Marek Vasut <marex@denx.de> Cc: Chin Liang See <clsee@altera.com> Cc: Dinh Nguyen <dinguyen@altera.com> Cc: Albert Aribaud <albert.u.boot@aribaud.net> Cc: Pavel Machek <pavel@denx.de> Cc: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com> Acked-by: Pavel Machek <pavel@denx.de> Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com> 10 years ago			`SoCFPGA EPCS/EPCQx1 mini howto:`
			`- Instantiate EPCS/EPCQx1 Serial flash controller in QSys and rebuild`
			`- The controller base address is the "Base" in QSys + 0x400`
			`- Set MSEL[4:0]=10010 (AS Standard)`
			`- Load the bitstream into FPGA, enable bridges`
			`- Only then will the driver work`