spi: Migrate CONFIG_KIRKWOOD_SPI to Kconfig

Signed-off-by: Tuomas Tynkkynen <tuomas@tuxera.com>
diff --git a/configs/controlcenterdc_defconfig b/configs/controlcenterdc_defconfig
index e85dbd9..893dc68 100644
--- a/configs/controlcenterdc_defconfig
+++ b/configs/controlcenterdc_defconfig
@@ -54,6 +54,7 @@
 CONFIG_DEBUG_UART_CLOCK=250000000
 CONFIG_DEBUG_UART_SHIFT=2
 CONFIG_SYS_NS16550=y
+CONFIG_KIRKWOOD_SPI=y
 CONFIG_TPM_ATMEL_TWI=y
 CONFIG_TPM_AUTH_SESSIONS=y
 CONFIG_TPM_FLUSH_RESOURCES=y