Convert CONFIG_DM9000_BYTE_SWAPPED et al to Kconfig

This converts the following to Kconfig:
   CONFIG_DM9000_BYTE_SWAPPED
   CONFIG_DM9000_NO_SROM
   CONFIG_DM9000_USE_16BIT
   CONFIG_DM9000_DEBUG
   CONFIG_MXC_GPT_HCLK
   CONFIG_NAND_6BYTES_OOB_FREE_10BYTES_ECC

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/at91sam9261ek_nandflash_defconfig b/configs/at91sam9261ek_nandflash_defconfig
index 8dbcb27..f232624 100644
--- a/configs/at91sam9261ek_nandflash_defconfig
+++ b/configs/at91sam9261ek_nandflash_defconfig
@@ -52,6 +52,8 @@
 CONFIG_SPI_FLASH_ATMEL=y
 CONFIG_SPI_FLASH_DATAFLASH=y
 CONFIG_DRIVER_DM9000=y
+CONFIG_DM9000_NO_SROM=y
+CONFIG_DM9000_USE_16BIT=y
 CONFIG_PINCTRL=y
 CONFIG_PINCTRL_AT91=y
 CONFIG_DM_SERIAL=y