arm: add slab.h to plat-samsung files for GFP_KERNEL

To fix messages like this:

  CC      arch/arm/plat-samsung/platformdata.o
arch/arm/plat-samsung/platformdata.c: In function 's3c_set_platdata':
arch/arm/plat-samsung/platformdata.c:29: error: 'GFP_KERNEL' undeclared (first use in this function)
arch/arm/plat-samsung/platformdata.c:29: error: (Each undeclared identifier is reported only once
arch/arm/plat-samsung/platformdata.c:29: error: for each function it appears in.)
make[3]: *** [arch/arm/plat-samsung/platformdata.o] Error 1

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

2 files changed, 2 insertions, 0 deletions

diff --git a/arch/arm/plat-samsung/dev-backlight.c b/arch/arm/plat-samsung/dev-backlight.c
index 3cedd4c407af..a976c023b286 100644
--- a/arch/arm/plat-samsung/dev-backlight.c
+++ b/arch/arm/plat-samsung/dev-backlight.c
@@ -12,6 +12,7 @@
 
 #include <linux/gpio.h>
 #include <linux/platform_device.h>
+#include <linux/slab.h>
 #include <linux/io.h>
 #include <linux/pwm_backlight.h>
 
diff --git a/arch/arm/plat-samsung/platformdata.c b/arch/arm/plat-samsung/platformdata.c
index 7cf2e1e3b20f..9037ca49c328 100644
--- a/arch/arm/plat-samsung/platformdata.c
+++ b/arch/arm/plat-samsung/platformdata.c
@@ -10,6 +10,7 @@
 */
 
 #include <linux/kernel.h>
+#include <linux/slab.h>
 #include <linux/string.h>
 #include <linux/platform_device.h>