udev,backlight,kernel-install: reword sentences starting with "Skipping to"

That's not gramatically correct.

In backlight, change "assocation" to "deduplication". Without the context,
it's probably not clear at all that we "associate" them to ignore them.

src/kernel-install/kernel-install.c

@@ -511,7 +511,7 @@ static int context_load_machine_info(Context *c) {
         if (r < 0 && r != -ENXIO)
                 log_warning_errno(r, "Failed to read $KERNEL_INSTALL_READ_MACHINE_INFO, assuming yes: %m");
         if (r == 0) {
-                log_debug("Skipping to read /etc/machine-info.");
+                log_debug("Skipping reading of /etc/machine-info.");
                 return 0;
         }