fs: erofs: reword "all-fragments" Kconfig text

Currently, both BR2_TARGET_ROOTFS_EROFS_ALL_FRAGMENTS and
BR2_TARGET_ROOTFS_EROFS_FRAGMENTS have the same Kconfig prompt, making
them hard to distinguish.

Reword the one for -Eall-fragments to be distinct.

Signed-off-by: Florian Larysch <fl@n621.de>
Signed-off-by: Julien Olivain <ju.o@free.fr>
(cherry picked from commit df7e428cf5512e1cd7da31f694d92ebb53f8344f)
Signed-off-by: Titouan Christophe <titouan.christophe@mind.be>

fs/erofs/Config.in

@@ -109,7 +109,7 @@ config BR2_TARGET_ROOTFS_EROFS_FRAGMENTS
 	  Introduced in Linux 6.1.
 
 config BR2_TARGET_ROOTFS_EROFS_ALL_FRAGMENTS
-	bool "enable fragments packing"
+	bool "enable all-fragments packing"
 	help
 	  Forcely record the whole files into a special inode for better
 	  compression. Introduced in Linux 6.1.