rockchip: pinctrl: rv1108: Move the iomux definitions into pinctrl-driver

If we include both the rk3288_grf.h and rv1108_grf.h, it will cause the
conflicts of redefinition. Clean the iomux definitions at grf_rv1108.h,
and move them into pinctrl-driver.

Signed-off-by: David Wu <david.wu@rock-chips.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
diff --git a/board/rockchip/evb_rv1108/evb_rv1108.c b/board/rockchip/evb_rv1108/evb_rv1108.c
index fe37eac..54bd08b 100644
--- a/board/rockchip/evb_rv1108/evb_rv1108.c
+++ b/board/rockchip/evb_rv1108/evb_rv1108.c
@@ -16,6 +16,23 @@
 {
 	int node;
 	struct rv1108_grf *grf;
+	enum {
+		GPIO3C3_SHIFT           = 6,
+		GPIO3C3_MASK            = 3 << GPIO3C3_SHIFT,
+
+		GPIO3C2_SHIFT           = 4,
+		GPIO3C2_MASK            = 3 << GPIO3C2_SHIFT,
+
+		GPIO2D2_SHIFT		= 4,
+		GPIO2D2_MASK		= 3 << GPIO2D2_SHIFT,
+		GPIO2D2_GPIO            = 0,
+		GPIO2D2_UART2_SOUT_M0,
+
+		GPIO2D1_SHIFT		= 2,
+		GPIO2D1_MASK		= 3 << GPIO2D1_SHIFT,
+		GPIO2D1_GPIO            = 0,
+		GPIO2D1_UART2_SIN_M0,
+	};
 
 	node = fdt_node_offset_by_compatible(gd->fdt_blob, -1, "rockchip,rv1108-grf");
 	grf = (struct rv1108_grf *)fdtdec_get_addr(gd->fdt_blob, node, "reg");