pci: pcie_dw_rockchip: Fixed the below compilation error
-rw-r--r-- 16576 .azure-pipelines.yml
-rw-r--r-- 817 .checkpatch.conf
-rw-r--r-- 169 .gitattributes
drwxr-xr-x - .github
-rw-r--r-- 939 .gitignore
-rw-r--r-- 9947 .gitlab-ci.yml
-rw-r--r-- 2325 .mailmap
-rw-r--r-- 502 .readthedocs.yml
-rw-r--r-- 783 Kbuild
-rw-r--r-- 15871 Kconfig
drwxr-xr-x - Licenses
-rw-r--r-- 32857 MAINTAINERS
-rw-r--r-- 77617 Makefile
-rw-r--r-- 164593 README
drwxr-xr-x - api
drwxr-xr-x - arch
drwxr-xr-x - board
drwxr-xr-x - cmd
drwxr-xr-x - common
-rw-r--r-- 2157 config.mk
drwxr-xr-x - configs
drwxr-xr-x - disk
drwxr-xr-x - doc
drwxr-xr-x - drivers
drwxr-xr-x - dts
drwxr-xr-x - env
drwxr-xr-x - examples
drwxr-xr-x - fs
drwxr-xr-x - include
drwxr-xr-x - lib
drwxr-xr-x - net
drwxr-xr-x - post
drwxr-xr-x - scripts
drwxr-xr-x - test
drwxr-xr-x - tools