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/pine64_plus_defconfig b/configs/pine64_plus_defconfig
index 45bf9b3..a778736 100644
--- a/configs/pine64_plus_defconfig
+++ b/configs/pine64_plus_defconfig
@@ -6,6 +6,7 @@
 # CONFIG_VIDEO is not set
 CONFIG_DEFAULT_DEVICE_TREE="pine64_plus"
 # CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
+CONFIG_HUSH_PARSER=y
 # CONFIG_CMD_IMLS is not set
 # CONFIG_CMD_FLASH is not set
 # CONFIG_CMD_FPGA is not set