[partition] Factor out GS keys for EFI-size sharing

src/modules/partition/core/PartUtils.cpp

@@ -530,10 +530,16 @@ isEfiBootable( const Partition* candidate )
     return flags.testFlag( KPM_PARTITION_FLAG_ESP );
 }
 
+QString
+efiFilesystemRecommendedSizeGSKey()
+{
+    return QStringLiteral( "efiSystemPartitionSize_i" );
+}
+
 qint64
 efiFilesystemRecommendedSize()
 {
-    const QString key = QStringLiteral( "efiSystemPartitionSize_i" );
+    const QString key = efiFilesystemRecommendedSizeGSKey();
 
     qint64 uefisys_part_sizeB = 300_MiB;
 
@@ -553,10 +559,16 @@ efiFilesystemRecommendedSize()
     return uefisys_part_sizeB;
 }
 
+QString
+efiFilesystemMinimumSizeGSKey()
+{
+    return QStringLiteral( "efiSystemPartitionMinimumSize_i" );
+}
+
 qint64
 efiFilesystemMinimumSize()
 {
-    const QString key = QStringLiteral( "efiSystemPartitionMinimumSize_i" );
+    const QString key = efiFilesystemMinimumSizeGSKey();
 
     qint64 uefisys_part_sizeB = efiFilesystemRecommendedSize();
 

src/modules/partition/core/PartUtils.h

@@ -120,12 +120,18 @@ bool isEfiFilesystemMinimumSize( const Partition* candidate );
  */
 qint64 efiFilesystemRecommendedSize();
 
+// Helper for consistency: the GS key used to share the recommended size
+QString efiFilesystemRecommendedSizeGSKey();
+
 /** @brief Returns the hard-minimum size of an EFI boot partition in bytes.
  *
  * This is 32MiB, based on the FAT32 standard and EFI documentation.
  */
 qint64 efiFilesystemMinimumSize();
 
+// Helper for consistency: the GS key used to share the minimum size
+QString efiFilesystemMinimumSizeGSKey();
+
 /**
  * @brief Is the given @p partition bootable in EFI? Depending on
  * the partition table layout, this may mean different flags.