simulation: fix build issue in fakeadc/dac.c (add includes)

Signed-off-by: Manohar Vanga <manohar.vanga@cern.ch>

simulation/fakeadc.c

@@ -21,6 +21,8 @@
  */
 
 #include <linux/wishbone.h>
+#include <linux/module.h>
+#include <linux/init.h>
 
 #define WB_ADC_VENDOR	0x0
 #define WB_ADC_DEVICE	0x1

simulation/fakedac.c

@@ -21,6 +21,8 @@
  */
 
 #include <linux/wishbone.h>
+#include <linux/module.h>
+#include <linux/init.h>
 
 #define WB_DAC_VENDOR	0x0
 #define WB_DAC_DEVICE	0x2