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/ls2080a_emu_defconfig b/configs/ls2080a_emu_defconfig
index eca5265..679fb87 100644
--- a/configs/ls2080a_emu_defconfig
+++ b/configs/ls2080a_emu_defconfig
@@ -5,6 +5,7 @@
 CONFIG_OF_BOARD_SETUP=y
 CONFIG_OF_STDOUT_VIA_ALIAS=y
 CONFIG_SYS_EXTRA_OPTIONS="EMU,SYS_FSL_DDR4, LS2080A"
+CONFIG_HUSH_PARSER=y
 # CONFIG_CMD_CONSOLE is not set
 # CONFIG_CMD_IMLS is not set
 # CONFIG_CMD_XIMG is not set