kernel: revert r24160 (remove the bogus ext2/ext3 dependency on linux 2.6.30/31)

For kernel versions newer then 2.6.31 the ext4 module can be used to mount
ext2/3 filesystems.
Building ext2/3 as modules on the other hand breaks using ext4 for mounting ext2
or ext3, which breaks booting from ext2/3 on machines where the ext4 module is
built into the kernel.

SVN-Revision: 26645

package/kernel/modules/fs.mk

@@ -76,7 +76,7 @@ define KernelPackage/fs-ext2
   SUBMENU:=$(FS_MENU)
   TITLE:=EXT2 filesystem support
   KCONFIG:=CONFIG_EXT2_FS
-  DEPENDS:=$(if $(DUMP)$(CONFIG_FS_MBCACHE),+kmod-fs-mbcache)
+  DEPENDS:=$(if $(DUMP)$(CONFIG_FS_MBCACHE),+kmod-fs-mbcache) @LINUX_2_6_30||LINUX_2_6_31
   FILES:=$(LINUX_DIR)/fs/ext2/ext2.ko
   AUTOLOAD:=$(call AutoLoad,32,ext2,1)
 endef
@@ -94,7 +94,7 @@ define KernelPackage/fs-ext3
   KCONFIG:= \
 	CONFIG_EXT3_FS \
 	CONFIG_JBD
-  DEPENDS:=$(if $(DUMP)$(CONFIG_FS_MBCACHE),+kmod-fs-mbcache)
+  DEPENDS:=$(if $(DUMP)$(CONFIG_FS_MBCACHE),+kmod-fs-mbcache) @LINUX_2_6_30||LINUX_2_6_31
   FILES:= \
 	$(LINUX_DIR)/fs/ext3/ext3.ko \
 	$(LINUX_DIR)/fs/jbd/jbd.ko