avr32: add export.h to arch/avr32 for EXPORT_SYMBOL/THIS_MODULE

Add it in where the module.h implicit presence was doing
the job before.

Signed-off-by: Paul Gortmaker <[e-mail]>

arch/avr32/mach-at32ap/clock.c

···
  */
 #include <linux/clk.h>
 #include <linux/err.h>
+#include <linux/export.h>
 #include <linux/device.h>
 #include <linux/string.h>
 #include <linux/list.h>

arch/avr32/mach-at32ap/cpufreq.c

···
 #include <linux/io.h>
 #include <linux/clk.h>
 #include <linux/err.h>
+#include <linux/export.h>
 #include <asm/system.h>
 
 static struct clk *cpuclk;

arch/avr32/mach-at32ap/intc.c

···
 #include <linux/irq.h>
 #include <linux/platform_device.h>
 #include <linux/syscore_ops.h>
+#include <linux/export.h>
 
 #include <asm/io.h>
 

arch/avr32/mach-at32ap/pio.c

···
 
 #include <linux/clk.h>
 #include <linux/debugfs.h>
+#include <linux/export.h>
 #include <linux/fs.h>
 #include <linux/platform_device.h>
 #include <linux/irq.h>

arch/avr32/mm/dma-coherent.c

···
 
 #include <linux/dma-mapping.h>
 #include <linux/gfp.h>
+#include <linux/export.h>
 
 #include <asm/addrspace.h>
 #include <asm/cacheflush.h>