freescale: Create the board/freescale/common/imx/ directory

In order to have a better hierarchy for the genimage scripts used by
NXP mx25, mx51, mx53, mx6, mx7 SoCs, let's place them inside the
board/freescale/common/imx/ directory.

This helps in creating a more natural separation between the mxs scripts
that are placed inside the board/freescale/common/mxs/ directory.

Suggested-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

board/freescale/common/imx/post-image.sh

@@ -35,7 +35,7 @@ main()
 	local GENIMAGE_TMP="${BUILD_DIR}/genimage.tmp"
 
 	sed -e "s/%FILES%/${FILES}/" \
-		board/freescale/common/genimage.cfg.template > ${GENIMAGE_CFG}
+		board/freescale/common/imx/genimage.cfg.template > ${GENIMAGE_CFG}
 
 	rm -rf "${GENIMAGE_TMP}"
 

board/freescale/imx25pdk/readme.txt

@@ -40,7 +40,7 @@ command as root:
 *** WARNING! This will destroy all the card content. Use with care! ***
 
 For details about the medium image layout, see the definition in
-board/freescale/common/genimage.cfg.template.
+board/freescale/common/imx/genimage.cfg.template.
 
 Boot the i.MX25 PDK board
 =========================

board/freescale/imx51evk/readme.txt

@@ -40,7 +40,7 @@ command as root:
 *** WARNING! This will destroy all the card content. Use with care! ***
 
 For details about the medium image layout, see the definition in
-board/freescale/common/genimage.cfg.template.
+board/freescale/common/imx/genimage.cfg.template.
 
 Boot the i.MX51 EVK board
 =========================

board/freescale/imx6sabre/readme.txt

@@ -71,7 +71,7 @@ command as root:
 *** WARNING! The script will destroy all the card content. Use with care! ***
 
 For details about the medium image layout, see the definition in
-board/freescale/common/genimage.cfg.template.
+board/freescale/common/imx/genimage.cfg.template.
 
 Boot the SABRE board
 ====================

board/freescale/imx6ulevk/readme.txt

@@ -43,7 +43,7 @@ command as root:
 *** WARNING! This will destroy all the card content. Use with care! ***
 
 For details about the medium image layout, see the definition in
-board/freescale/common/genimage.cfg.template.
+board/freescale/common/imx/genimage.cfg.template.
 
 Boot the i.MX6UL EVK board
 =========================

board/freescale/imx7dsdb/readme.txt

@@ -40,7 +40,7 @@ command as root:
 *** WARNING! This will destroy all the card content. Use with care! ***
 
 For details about the medium image layout, see the definition in
-board/freescale/common/genimage.cfg.template.
+board/freescale/common/imx/genimage.cfg.template.
 
 Boot the i.MX7D SDB board
 =========================