boards: cc1352p1_launchxl: fix antenna mux config

The antenna MUX configuration should explicitly define PULL states as
giving no value will leave the GPIO register in an unspecified state.

Signed-off-by: Florian Grandel <fgrandel@code-for-humans.de>

boards/arm/cc1352p1_launchxl/cc1352p1_launchxl-pinctrl.dtsi

@@ -62,20 +62,26 @@
 	/* On-board antenna pinmux states */
 	board_ant_24g_off: board_ant_24g_off {
 		pinmux = <28 IOC_PORT_GPIO>;
+		bias-disable;
 	};
 	board_ant_24g_on: board_ant_24g_on {
 		pinmux = <28 IOC_PORT_RFC_GPO0>;
+		bias-disable;
 	};
 	board_ant_tx_pa_off: board_ant_tx_pa_off {
 		pinmux = <29 IOC_PORT_GPIO>;
+		bias-disable;
 	};
 	board_ant_tx_pa_on: board_ant_tx_pa_on {
 		pinmux = <29 IOC_PORT_RFC_GPO3>;
+		bias-disable;
 	};
 	board_ant_subg_off: board_ant_subg_off {
 		pinmux = <30 IOC_PORT_GPIO>;
+		bias-disable;
 	};
 	board_ant_subg_on: board_ant_subg_on {
 		pinmux = <30 IOC_PORT_RFC_GPO0>;
+		bias-disable;
 	};
 };