* export xcm_pallet config

Signed-off-by: Cheng JIANG <alex_cj96@foxmail.com>

* run format

Signed-off-by: Cheng JIANG <alex_cj96@foxmail.com>

* fix typo

Signed-off-by: Cheng JIANG <alex_cj96@foxmail.com>

* add generic parameter to support different runtimes

* Revert "add generic parameter to support different runtimes"

This reverts commit 4405ea9f.