dt-bindings: clock: Add RTC related clocks for Ingenic SoCs.

Add RTC related clocks bindings for the JZ4780 SoC, the X1000 SoC,
and the X1830 SoC from Ingenic.
Tested-by: 周正 (Zhou Zheng) <sernia.zhou@foxmail.com>
Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
Link: https://lore.kernel.org/r/20200725051136.58220-2-zhouyanjie@wanyeetech.comSigned-off-by: Stephen Boyd <sboyd@kernel.org>

include/dt-bindings/clock/jz4780-cgu.h

@@ -85,5 +85,7 @@
 #define JZ4780_CLK_DES		70
 #define JZ4780_CLK_X2D		71
 #define JZ4780_CLK_CORE1	72
+#define JZ4780_CLK_EXCLK_DIV512	73
+#define JZ4780_CLK_RTC		74
 
 #endif /* __DT_BINDINGS_CLOCK_JZ4780_CGU_H__ */

include/dt-bindings/clock/x1000-cgu.h

@@ -48,5 +48,7 @@
 #define X1000_CLK_SSI			33
 #define X1000_CLK_OST			34
 #define X1000_CLK_PDMA			35
+#define X1000_CLK_EXCLK_DIV512	36
+#define X1000_CLK_RTC			37
 
 #endif /* __DT_BINDINGS_CLOCK_X1000_CGU_H__ */

include/dt-bindings/clock/x1830-cgu.h

@@ -51,5 +51,7 @@
 #define X1830_CLK_TCU			36
 #define X1830_CLK_DTRNG			37
 #define X1830_CLK_OST			38
+#define X1830_CLK_EXCLK_DIV512	39
+#define X1830_CLK_RTC			40
 
 #endif /* __DT_BINDINGS_CLOCK_X1830_CGU_H__ */