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/da850evm_defconfig b/configs/da850evm_defconfig
index ec80edf..9b1b619 100644
--- a/configs/da850evm_defconfig
+++ b/configs/da850evm_defconfig
@@ -35,6 +35,7 @@
 # CONFIG_DISPLAY_BOARDINFO is not set
 CONFIG_BOARD_EARLY_INIT_F=y
 CONFIG_CLOCKS=y
+CONFIG_HWCONFIG=y
 CONFIG_MISC_INIT_R=y
 CONFIG_SPL_PAD_TO=0x8000
 CONFIG_SPL_HAS_BSS_LINKER_SECTION=y