plymouth: suppress "find" errors

modules.d/50plymouth/installkernel

@@ -1,5 +1,5 @@
 #!/bin/bash
 # Include KMS capable drm drivers
-for modname in $(find "$srcmods/kernel/drivers/gpu/drm" -name '*.ko'); do
+for modname in $(find "$srcmods/kernel/drivers/gpu/drm" -name '*.ko' 2>/dev/null); do
     nm -uPA $modname | grep -q drm_crtc_init && instmods $modname
 done