sunxi: clock: Add clock_get_pll3() helper function

Add a helper function to get the pll3 clock rate.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
diff --git a/arch/arm/include/asm/arch-sunxi/clock_sun4i.h b/arch/arm/include/asm/arch-sunxi/clock_sun4i.h
index b397809..1a0b525 100644
--- a/arch/arm/include/asm/arch-sunxi/clock_sun4i.h
+++ b/arch/arm/include/asm/arch-sunxi/clock_sun4i.h
@@ -208,6 +208,8 @@
 #define CCM_AHB_GATE_DLL (0x1 << 15)
 #define CCM_AHB_GATE_ACE (0x1 << 16)
 
+#define CCM_PLL3_CTRL_M_SHIFT		0
+#define CCM_PLL3_CTRL_M_MASK		(0x7f << CCM_PLL3_CTRL_M_SHIFT)
 #define CCM_PLL3_CTRL_M(n)		(((n) & 0x7f) << 0)
 #define CCM_PLL3_CTRL_INTEGER_MODE	(0x1 << 15)
 #define CCM_PLL3_CTRL_EN		(0x1 << 31)
@@ -347,6 +349,7 @@
 #ifndef __ASSEMBLY__
 void clock_set_pll1(unsigned int hz);
 void clock_set_pll3(unsigned int hz);
+unsigned int clock_get_pll3(void);
 unsigned int clock_get_pll5p(void);
 unsigned int clock_get_pll6(void);
 #endif