[ARM] Add missing IM-PD1 header file.

include/asm-arm/arch-integrator/impd1.h

+#define IMPD1_OSC1	0x00
+#define IMPD1_OSC2	0x04
+#define IMPD1_LOCK	0x08
+#define IMPD1_LEDS	0x0c
+#define IMPD1_INT	0x10
+#define IMPD1_SW	0x14
+#define IMPD1_CTRL	0x18
+
+#define IMPD1_CTRL_DISP_LCD	(0 << 0)
+#define IMPD1_CTRL_DISP_VGA	(1 << 0)
+#define IMPD1_CTRL_DISP_LCD1	(2 << 0)
+#define IMPD1_CTRL_DISP_ENABLE	(1 << 2)
+#define IMPD1_CTRL_DISP_MASK	(7 << 0)
+
+struct device;
+
+void impd1_set_vco(struct device *dev, int vconr, unsigned long period);
+void impd1_tweak_control(struct device *dev, u32 mask, u32 val);
+