nios2: convert altera sysid to driver model

Convert altera sysid to driver model with misc uclass.

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Acked-by: Chin Liang See <clsee@altera.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/nios2-generic_defconfig b/configs/nios2-generic_defconfig
index 505a2cf..3d404b2 100644
--- a/configs/nios2-generic_defconfig
+++ b/configs/nios2-generic_defconfig
@@ -16,6 +16,8 @@
 CONFIG_CMD_PING=y
 CONFIG_NET_RANDOM_ETHADDR=y
 CONFIG_ALTERA_PIO=y
+CONFIG_MISC=y
+CONFIG_ALTERA_SYSID=y
 CONFIG_ALTERA_JTAG_UART=y
 CONFIG_ALTERA_JTAG_UART_BYPASS=y
 CONFIG_TIMER=y