dt-bindings: clock: Add AST2600 RMII RCLK gate definitions

The AST2600 has an explicit gate for the RMII RCLK for each of the four
MACs.

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Joel Stanley <joel@jms.id.au>
diff --git a/include/dt-bindings/clock/ast2600-clock.h b/include/dt-bindings/clock/ast2600-clock.h
index 38074a5..62b9520 100644
--- a/include/dt-bindings/clock/ast2600-clock.h
+++ b/include/dt-bindings/clock/ast2600-clock.h
@@ -83,6 +83,10 @@
 #define ASPEED_CLK_MAC12		64
 #define ASPEED_CLK_MAC34		65
 #define ASPEED_CLK_USBPHY_40M		66
+#define ASPEED_CLK_MAC1RCLK		67
+#define ASPEED_CLK_MAC2RCLK		68
+#define ASPEED_CLK_MAC3RCLK		69
+#define ASPEED_CLK_MAC4RCLK		70
 
 /* Only list resets here that are not part of a gate */
 #define ASPEED_RESET_ADC		55