arm64: dts: hisi: add drive strength levels of the pins for Hi3660 SoC

Extend drive strength levels of the pins for Hi3660 Soc.
Signed-off-by: NWang Xiaoyin <hw.wangxiaoyin@hisilicon.com>
Signed-off-by: NWei Xu <xuwei5@hisilicon.com>

include/dt-bindings/pinctrl/hisi.h

@@ -56,4 +56,19 @@
 #define DRIVE4_08MA	(4 << 4)
 #define DRIVE4_10MA	(6 << 4)
 
+/* drive strength definition for hi3660 */
+#define DRIVE6_MASK	(15 << 4)
+#define DRIVE6_04MA	(0 << 4)
+#define DRIVE6_12MA	(4 << 4)
+#define DRIVE6_19MA	(8 << 4)
+#define DRIVE6_27MA	(10 << 4)
+#define DRIVE6_32MA	(15 << 4)
+#define DRIVE7_02MA	(0 << 4)
+#define DRIVE7_04MA	(1 << 4)
+#define DRIVE7_06MA	(2 << 4)
+#define DRIVE7_08MA	(3 << 4)
+#define DRIVE7_10MA	(4 << 4)
+#define DRIVE7_12MA	(5 << 4)
+#define DRIVE7_14MA	(6 << 4)
+#define DRIVE7_16MA	(7 << 4)
 #endif