kernel: move old firmware uimage splitter into separated patch

This will allow us to drop it in the future. This patch doesn't change
the final mtdpart.c, it remains the same.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>

SVN-Revision: 43696

target/linux/generic/patches-3.14/405-mtd-add-more-helper-functions.patch

@@ -18,7 +18,25 @@
  	}
  	if (slave->offset == MTDPART_OFS_RETAIN) {
  		slave->offset = cur_offset;
-@@ -944,6 +942,24 @@ int mtd_is_partition(const struct mtd_in
+@@ -659,6 +657,17 @@ run_parsers_by_type(struct mtd_part *sla
+ 	return nr_parts;
+ }
+ 
++static inline unsigned long
++mtd_pad_erasesize(struct mtd_info *mtd, int offset, int len)
++{
++	unsigned long mask = mtd->erasesize - 1;
++
++	len += offset & mask;
++	len = (len + mask) & ~mask;
++	len -= offset & mask;
++	return len;
++}
++
+ #ifdef CONFIG_MTD_SPLIT_FIRMWARE_NAME
+ #define SPLIT_FIRMWARE_NAME	CONFIG_MTD_SPLIT_FIRMWARE_NAME
+ #else
+@@ -900,6 +909,24 @@ int mtd_is_partition(const struct mtd_in
  }
  EXPORT_SYMBOL_GPL(mtd_is_partition);