arm: Add export.h to ARM specific files as required.

These files all make use of one of the EXPORT_SYMBOL variants
or the THIS_MODULE macro.  So they will need <linux/export.h>

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
diff --git a/arch/arm/mach-s3c2410/mach-h1940.c b/arch/arm/mach-s3c2410/mach-h1940.c
index 556c535..3428d4a 100644
--- a/arch/arm/mach-s3c2410/mach-h1940.c
+++ b/arch/arm/mach-s3c2410/mach-h1940.c
@@ -35,6 +35,7 @@
 #include <video/platform_lcd.h>
 
 #include <linux/mmc/host.h>
+#include <linux/export.h>
 
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>