omap2/3: Multiboot compile fixes to compile in omap2 and omap3

Allows compiling in omap2 and omap3.

Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/mach-omap2/clock.h b/arch/arm/mach-omap2/clock.h
index 7bc344b..a6e85f46 100644
--- a/arch/arm/mach-omap2/clock.h
+++ b/arch/arm/mach-omap2/clock.h
@@ -83,6 +83,32 @@
 u32 omap2_get_dpll_rate(struct clk *clk);
 void omap2_init_dpll_parent(struct clk *clk);
 int omap2_wait_clock_ready(void __iomem *reg, u32 cval, const char *name);
+
+
+#ifdef CONFIG_ARCH_OMAP2
+void omap2xxx_clk_prepare_for_reboot(void);
+#else
+static inline void omap2xxx_clk_prepare_for_reboot(void)
+{
+}
+#endif
+
+#ifdef CONFIG_ARCH_OMAP3
+void omap3_clk_prepare_for_reboot(void);
+#else
+static inline void omap3_clk_prepare_for_reboot(void)
+{
+}
+#endif
+
+#ifdef CONFIG_ARCH_OMAP4
+void omap4_clk_prepare_for_reboot(void);
+#else
+static inline void omap4_clk_prepare_for_reboot(void)
+{
+}
+#endif
+
 int omap2_dflt_clk_enable(struct clk *clk);
 void omap2_dflt_clk_disable(struct clk *clk);
 void omap2_clk_dflt_find_companion(struct clk *clk, void __iomem **other_reg,