Fix build with poppler-26.04.0 (this one is not really required,
but it was part of the commit).

From upstream commit 4c6443c7b9795d43b15fdf9c47347edae1068dd3.

Index: frmts/pdf/CMakeLists.txt
--- frmts/pdf/CMakeLists.txt.orig
+++ frmts/pdf/CMakeLists.txt
@@ -67,11 +67,11 @@ if (GDAL_USE_POPPLER)
   if ("${Poppler_VERSION_MINOR}" MATCHES "0?[0-9]+")
     string(REGEX REPLACE "0?([0-9]+)" "\\1" Poppler_VERSION_MINOR ${Poppler_VERSION_MINOR})
   endif ()
-  # POPPLER_24_05_OR_LATER used transiently (by fuzzers/build.sh) until 24.05 is actually released
-  if (Poppler_VERSION_STRING VERSION_GREATER_EQUAL "24.05" OR POPPLER_24_05_OR_LATER)
+  if (Poppler_VERSION_STRING VERSION_GREATER_EQUAL "24.05")
     target_compile_features(gdal_PDF PRIVATE cxx_std_20)
   endif ()
-  target_compile_definitions(gdal_PDF PRIVATE -DHAVE_POPPLER -DPOPPLER_MAJOR_VERSION=${Poppler_VERSION_MAJOR}
+  target_compile_definitions(gdal_PDF PRIVATE -DHAVE_POPPLER
+                                              -DPOPPLER_MAJOR_VERSION=${Poppler_VERSION_MAJOR}
                                               -DPOPPLER_MINOR_VERSION=${Poppler_VERSION_MINOR})
 endif ()
 if (GDAL_USE_PODOFO)
