Convert CONFIG_HWCONFIG to Kconfig

This converts the following to Kconfig:
   CONFIG_HWCONFIG

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/socrates_defconfig b/configs/socrates_defconfig
index b89c348..ab52ea2 100644
--- a/configs/socrates_defconfig
+++ b/configs/socrates_defconfig
@@ -23,6 +23,7 @@
 CONFIG_PREBOOT="echo;echo Welcome on the ABB Socrates Board;echo"
 CONFIG_SYS_CONSOLE_IS_IN_ENV=y
 CONFIG_BOARD_EARLY_INIT_R=y
+# CONFIG_HWCONFIG is not set
 CONFIG_HUSH_PARSER=y
 CONFIG_SYS_PBSIZE=276
 CONFIG_CMD_REGINFO=y