tree-wide: coccinelle fixes

Yet another batch of Coccinelle fixes.

src/basic/efivars.c

@@ -382,7 +382,7 @@ int systemd_efi_options_efivarfs_if_newer(char **line) {
                 return log_debug_errno(errno, "Failed to stat EFI variable SystemdOptions: %m");
 
         if (stat(EFIVAR_CACHE_PATH(EFI_SYSTEMD_VARIABLE(SystemdOptions)), &b) < 0) {
-                if (errno != -ENOENT)
+                if (errno != ENOENT)
                         log_debug_errno(errno, "Failed to stat "EFIVAR_CACHE_PATH(EFI_SYSTEMD_VARIABLE(SystemdOptions))": %m");
         } else if (compare_stat_mtime(&a, &b) > 0)
                 log_debug("Variable SystemdOptions in evifarfs is newer than in cache.");

src/basic/time-util.c

@@ -1334,10 +1334,10 @@ static int get_timezones_from_tzdata_zi(char ***ret) {
                         continue;
 
                 char *tz;
-                if (*type == 'Z' || *type == 'z')
+                if (IN_SET(*type, 'Z', 'z'))
                         /* Zone lines have timezone in field 1. */
                         tz = f1;
-                else if (*type == 'L' || *type == 'l')
+                else if (IN_SET(*type, 'L', 'l'))
                         /* Link lines have timezone in field 2. */
                         tz = f2;
                 else