nios2: move command line configuration to Kconfig

This patch moves command line configuration from board header
file to board defconfig in the way of Kconfig. The change passed
savedefconfig.

This fixes warnings such as : "CONFIG_SYS_HUSH_PARSER" redefined,
when "Use hush shell" is selected with menuconfig, etc.
Signed-off-by: NThomas Chou <thomas@wytron.com.tw>

configs/nios2-generic_defconfig

 CONFIG_NIOS2=y
 CONFIG_TARGET_NIOS2_GENERIC=y
+CONFIG_HUSH_PARSER=y
 # CONFIG_CMD_BOOTD is not set
 # CONFIG_CMD_IMLS is not set
 # CONFIG_CMD_XIMG is not set
 # CONFIG_CMD_FPGA is not set
 # CONFIG_CMD_ITEST is not set
 # CONFIG_CMD_SETEXPR is not set
+CONFIG_CMD_DHCP=y
 # CONFIG_CMD_NFS is not set
+CONFIG_CMD_PING=y

include/configs/nios2-generic.h

@@ -73,13 +73,8 @@
 #define CONFIG_BOOTP_HOSTNAME
 
 /*
- * Command line configuration.
+ * FDT options
  */
-#ifdef CONFIG_CMD_NET
-# define CONFIG_CMD_DHCP
-# define CONFIG_CMD_PING
-#endif
-
 #define CONFIG_OF_LIBFDT
 #define CONFIG_OF_BOARD_SETUP
 #define CONFIG_LMB
@@ -130,6 +125,4 @@
 #define CONFIG_SYS_MEMTEST_END		(CONFIG_SYS_INIT_SP - 0x20000)
 #define CONFIG_CMDLINE_EDITING
 
-#define CONFIG_SYS_HUSH_PARSER
-
 #endif /* __CONFIG_H */