Add the new locking calls to ensure that these are always exclusively
accessing the GPIO registers.

Fixes a possible race between two threads modifying the same GPIO bank,
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Add the necessary 1,2 and 4 bit configuration read calls for the new
gpio code to allow removal of the old s3c24xx gpio code.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

The s5p6440-clock.c and s5p6440-init.c code in the plat-s5p is specific to
s5p6440 SoC based systems. So these files are being moved to the machine
directory of s5p6440. And these files are renamed in the machine directory.
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

This patch adds Samsung's S5P6440 GPIO support.
Signed-off-by: NAdityapratap Sharma <aditya.ps@samsung.com>
Signed-off-by: NAtul Dahiya <atul.dahiya@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>