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/kmopti2_defconfig b/configs/kmopti2_defconfig
index 1d29c87..e339b8a 100644
--- a/configs/kmopti2_defconfig
+++ b/configs/kmopti2_defconfig
@@ -4,5 +4,6 @@
 CONFIG_OF_BOARD_SETUP=y
 CONFIG_OF_STDOUT_VIA_ALIAS=y
 CONFIG_SYS_EXTRA_OPTIONS="KMOPTI2"
+CONFIG_HUSH_PARSER=y
 CONFIG_SYS_NS16550=y
 CONFIG_OF_LIBFDT=y