move amdgpu_discovery_reg_base_init() from navi1*_reg_base_init() to a
common function nv_reg_base_init().
Signed-off-by: NXiaojie Yuan <xiaojie.yuan@amd.com>
Reviewed-by: NHawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>