* update realsr

* add clean func

* update README

* update falsr_a

* add clean func

* update falsr

* add swinir_m_real_sr_x2

* update README

* fix typo

* fix typo

* add swinir_m_real_sr_x4

* fix typo

* fix typo

* git add swinir_l_real_sr_x4

* fix typo

* fix typo
Co-authored-by: Nchenjian <chenjian26@baidu.com>

* update dcscn

* add clean func

* update dcscn

* update falsr_c

* update version

* add clean func

* update falsr_c

* update falsr_b

* add clean func

* update falsr_b