configs: Re-sync HUSH options

Move all cases of CONFIG_SYS_HUSH_PARSER out of the config.h files.  Remove
all cases of CONFIG_SYS_PROMPT_HUSH_PS2 as everyone uses the default.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/xpedite1000_defconfig b/configs/xpedite1000_defconfig
index 45cd821..e189859 100644
--- a/configs/xpedite1000_defconfig
+++ b/configs/xpedite1000_defconfig
@@ -3,5 +3,6 @@
 CONFIG_TARGET_XPEDITE1000=y
 CONFIG_FIT=y
 CONFIG_FIT_VERBOSE=y
+CONFIG_HUSH_PARSER=y
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_SYS_NS16550=y