fix(drm): shellcheck for modules.d/50drm

modules.d/50drm/module-setup.sh

@@ -12,7 +12,6 @@ depends() {
 
 # called by dracut
 installkernel() {
-    local _modname
     # Include KMS capable drm drivers
 
     if [[ ${DRACUT_ARCH:-$(uname -m)} == arm* || ${DRACUT_ARCH:-$(uname -m)} == aarch64 ]]; then
@@ -21,8 +20,7 @@ installkernel() {
             "=drivers/gpu/drm/i2c" \
             "=drivers/gpu/drm/panel" \
             "=drivers/gpu/drm/bridge" \
-            "=drivers/video/backlight" \
-            ${NULL}
+            "=drivers/video/backlight"
     fi
 
     instmods amdkfd hyperv_fb "=drivers/pwm"
@@ -34,6 +32,7 @@ installkernel() {
         for i in /sys/bus/{pci/devices,platform/devices,virtio/devices,soc/devices/soc?}/*/modalias; do
             [[ -e $i ]] || continue
             [[ -n $(< "$i") ]] || continue
+            # shellcheck disable=SC2046
             if hostonly="" dracut_instmods --silent -s "drm_crtc_init|drm_dev_register|drm_encoder_init" -S "iw_handler_get_spy" $(< "$i"); then
                 if strstr "$(modinfo -F filename $(< "$i") 2> /dev/null)" radeon.ko; then
                     hostonly='' instmods amdkfd