ARM: dts: rockchip: fix the pinctrl bias settings for rk3036

The pinctrl gpio pull up/down is incorrect since the rk3036 SoCs
can't set the status in the internal.

We should keep the default status for enable the gpio status,
In fact, the pull_none is the disable the gpio pull up/down.
Signed-off-by: Xing Zheng <zhengxing@rock-chips.com>
Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm/boot/dts/rk3036.dtsi

@@ -427,12 +427,8 @@ gpio2: gpio2@20084000 {
 			#interrupt-cells = <2>;
 		};
 
-		pcfg_pull_up: pcfg-pull-up {
-			bias-pull-up;
-		};
-
-		pcfg_pull_down: pcfg-pull-down {
-			bias-pull-down;
+		pcfg_pull_default: pcfg_pull_default {
+			bias-pull-pin-default;
 		};
 
 		pcfg_pull_none: pcfg-pull-none {
@@ -473,18 +469,18 @@ emmc_clk: emmc-clk {
 			};
 
 			emmc_cmd: emmc-cmd {
-				rockchip,pins = <2 1 RK_FUNC_2 &pcfg_pull_none>;
+				rockchip,pins = <2 1 RK_FUNC_2 &pcfg_pull_default>;
 			};
 
 			emmc_bus8: emmc-bus8 {
-				rockchip,pins = <1 24 RK_FUNC_2 &pcfg_pull_none>,
-						<1 25 RK_FUNC_2 &pcfg_pull_none>,
-						<1 26 RK_FUNC_2 &pcfg_pull_none>,
-						<1 27 RK_FUNC_2 &pcfg_pull_none>,
-						<1 28 RK_FUNC_2 &pcfg_pull_none>,
-						<1 29 RK_FUNC_2 &pcfg_pull_none>,
-						<1 30 RK_FUNC_2 &pcfg_pull_none>,
-						<1 31 RK_FUNC_2 &pcfg_pull_none>;
+				rockchip,pins = <1 24 RK_FUNC_2 &pcfg_pull_default>,
+						<1 25 RK_FUNC_2 &pcfg_pull_default>,
+						<1 26 RK_FUNC_2 &pcfg_pull_default>,
+						<1 27 RK_FUNC_2 &pcfg_pull_default>,
+						<1 28 RK_FUNC_2 &pcfg_pull_default>,
+						<1 29 RK_FUNC_2 &pcfg_pull_default>,
+						<1 30 RK_FUNC_2 &pcfg_pull_default>,
+						<1 31 RK_FUNC_2 &pcfg_pull_default>;
 			};
 		};
 
@@ -522,12 +518,12 @@ i2s_bus: i2s-bus {
 
 		uart0 {
 			uart0_xfer: uart0-xfer {
-				rockchip,pins = <0 16 RK_FUNC_1 &pcfg_pull_up>,
+				rockchip,pins = <0 16 RK_FUNC_1 &pcfg_pull_default>,
 						<0 17 RK_FUNC_1 &pcfg_pull_none>;
 			};
 
 			uart0_cts: uart0-cts {
-				rockchip,pins = <0 18 RK_FUNC_1 &pcfg_pull_up>;
+				rockchip,pins = <0 18 RK_FUNC_1 &pcfg_pull_default>;
 			};
 
 			uart0_rts: uart0-rts {
@@ -537,7 +533,7 @@ uart0_rts: uart0-rts {
 
 		uart1 {
 			uart1_xfer: uart1-xfer {
-				rockchip,pins = <2 22 RK_FUNC_1 &pcfg_pull_none>,
+				rockchip,pins = <2 22 RK_FUNC_1 &pcfg_pull_default>,
 						<2 23 RK_FUNC_1 &pcfg_pull_none>;
 			};
 			/* no rts / cts for uart1 */
@@ -545,7 +541,7 @@ uart1_xfer: uart1-xfer {
 
 		uart2 {
 			uart2_xfer: uart2-xfer {
-				rockchip,pins = <1 18 RK_FUNC_2 &pcfg_pull_none>,
+				rockchip,pins = <1 18 RK_FUNC_2 &pcfg_pull_default>,
 						<1 19 RK_FUNC_2 &pcfg_pull_none>;
 			};
 			/* no rts / cts for uart2 */