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/omap3_ha_defconfig b/configs/omap3_ha_defconfig
index 5fc4bfc..9c294c3 100644
--- a/configs/omap3_ha_defconfig
+++ b/configs/omap3_ha_defconfig
@@ -3,6 +3,7 @@
 CONFIG_TARGET_TAO3530=y
 CONFIG_SPL=y
 CONFIG_SYS_EXTRA_OPTIONS="SYS_BOARD_OMAP3_HA"
+CONFIG_HUSH_PARSER=y
 # CONFIG_CMD_IMI is not set
 # CONFIG_CMD_IMLS is not set
 # CONFIG_CMD_FLASH is not set