lantiq: disable buffered writes on Intel command set flash

Some Lantiq SoCs are not able to use buffered writes properly with
Intel command set flash due to the way NOR addresses on EBU are
manipulated. This patch disables buffered writes on those devices.
The only device affected at the moment is ARV4510PW, others use
AMD/Fujitsu command set.

Signed-off-by: Matti Laakso <malaakso@elisanet.fi>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@44451 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/lantiq/patches-3.14/0300-MTD-cfi-cmdset-0001-disable-buffered-writes.patch

+--- a/drivers/mtd/chips/cfi_cmdset_0001.c
++++ b/drivers/mtd/chips/cfi_cmdset_0001.c
+@@ -40,7 +40,7 @@
+ /* #define CMDSET0001_DISABLE_WRITE_SUSPEND */
+ 
+ // debugging, turns off buffer write mode if set to 1
+-#define FORCE_WORD_WRITE 0
++#define FORCE_WORD_WRITE 1
+ 
+ /* Intel chips */
+ #define I82802AB	0x00ad

target/linux/lantiq/patches-3.18/0300-MTD-cfi-cmdset-0001-disable-buffered-writes.patch

+--- a/drivers/mtd/chips/cfi_cmdset_0001.c
++++ b/drivers/mtd/chips/cfi_cmdset_0001.c
+@@ -40,7 +40,7 @@
+ /* #define CMDSET0001_DISABLE_WRITE_SUSPEND */
+ 
+ // debugging, turns off buffer write mode if set to 1
+-#define FORCE_WORD_WRITE 0
++#define FORCE_WORD_WRITE 1
+ 
+ /* Intel chips */
+ #define I82802AB	0x00ad