am33xx: add SSC enable macro

Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
diff --git a/arch/arm/include/asm/arch-am33xx/clock.h b/arch/arm/include/asm/arch-am33xx/clock.h
index 7637457..f00fad3 100644
--- a/arch/arm/include/asm/arch-am33xx/clock.h
+++ b/arch/arm/include/asm/arch-am33xx/clock.h
@@ -42,6 +42,8 @@
 #define MODULE_CLKCTRL_IDLEST_DISABLED		3
 
 /* CM_CLKMODE_DPLL */
+#define CM_CLKMODE_DPLL_SSC_EN_SHIFT		12
+#define CM_CLKMODE_DPLL_SSC_EN_MASK		(1 << 12)
 #define CM_CLKMODE_DPLL_REGM4XEN_SHIFT		11
 #define CM_CLKMODE_DPLL_REGM4XEN_MASK		(1 << 11)
 #define CM_CLKMODE_DPLL_LPMODE_EN_SHIFT		10