sf: spi_flash cleanups

More cleanups on spi_flash side:
- Removed unneeded comments.
- Rearranged macros in proper location.
- Rearranged func declerations
- Renamed few function names.
- Added License headers.

Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
diff --git a/drivers/mtd/spi/Makefile b/drivers/mtd/spi/Makefile
index 5678134..0fa867d 100644
--- a/drivers/mtd/spi/Makefile
+++ b/drivers/mtd/spi/Makefile
@@ -17,8 +17,8 @@
 ifdef CONFIG_CMD_SF
 COBJS-y        += spi_flash.o
 endif
-COBJS-$(CONFIG_SPI_FLASH)	+= spi_flash_probe.o spi_flash_ops.o
-COBJS-$(CONFIG_SPI_FRAM_RAMTRON)	+= ramtron.o
+COBJS-$(CONFIG_SPI_FLASH) += spi_flash_probe.o spi_flash_ops.o
+COBJS-$(CONFIG_SPI_FRAM_RAMTRON) += ramtron.o
 COBJS-$(CONFIG_SPI_M95XXX) += eeprom_m95xxx.o
 
 COBJS	:= $(COBJS-y)