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/TQM850M_defconfig b/configs/TQM850M_defconfig
index 4c66cc1..63941ac 100644
--- a/configs/TQM850M_defconfig
+++ b/configs/TQM850M_defconfig
@@ -2,5 +2,6 @@
 CONFIG_8xx=y
 CONFIG_TARGET_TQM850M=y
 CONFIG_OF_BOARD_SETUP=y
+CONFIG_HUSH_PARSER=y
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_OF_LIBFDT=y