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/secomx6quq7_defconfig b/configs/secomx6quq7_defconfig
index 0980e68..d19876a 100644
--- a/configs/secomx6quq7_defconfig
+++ b/configs/secomx6quq7_defconfig
@@ -5,6 +5,7 @@
 CONFIG_SECOMX6Q=y
 CONFIG_SECOMX6_2GB=y
 CONFIG_SYS_EXTRA_OPTIONS="ENV_IS_IN_MMC"
+CONFIG_HUSH_PARSER=y
 CONFIG_SYS_PROMPT="SECO MX6Q uQ7 U-Boot > "
 # CONFIG_CMD_IMLS is not set
 # CONFIG_CMD_FLASH is not set