ARM: dts: Fix dm814x pinctrl address and mask

Otherwise pinctrl won't work. Because of silicon errata for some dm814x
versions, let's also keep bit 18 out of the function-mask and rely on
the bootloader configuration for bit 18  as suggested by
Matthijs van Duin <matthijsvanduin@gmail.com>.

Devices with that need to use bit 18 can override the function-mask in
the board specific dts file if really needed.

Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/dm814x.dtsi

@@ -205,13 +205,21 @@
 					};
 				};
 
+				/*
+				 * Note that silicon revision 2.1 and older
+				 * require input enabled (bit 18 set) for all
+				 * 3.3V I/Os to avoid cumulative hardware damage.
+				 * For more info, see errata advisory 2.1.87.
+				 * We leave bit 18 out of function-mask and rely
+				 * on the bootloader for it.
+				 */
 				pincntl: pinmux@800 {
 					compatible = "pinctrl-single";
-					reg = <0x800 0xc38>;
+					reg = <0x800 0x438>;
 					#address-cells = <1>;
 					#size-cells = <0>;
 					pinctrl-single,register-width = <32>;
-					pinctrl-single,function-mask = <0x300ff>;
+					pinctrl-single,function-mask = <0x307ff>;
 				};
 			};