arm: dts: stm32mp1: Drop fastboot and stm32prog trigger gpios on DHCOM

PA13 and PA14 are used for USB power control and can't be used
to enforce fastboot or stm32prog mode by pressing a button.

Defining CONFIG_FASTBOOT/CONFIG_CMD_STM32PROG without this patch applied
results in fastboot/stm32prog always starting, because PA13/PA14 are always
low during boot. So drop the wrong trigger gpios definitions.

Signed-off-by: Johann Neuhauser <jneuhauser@dh-electronics.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
diff --git a/arch/arm/dts/stm32mp15xx-dhcom-u-boot.dtsi b/arch/arm/dts/stm32mp15xx-dhcom-u-boot.dtsi
index d73967a..ee747a5 100644
--- a/arch/arm/dts/stm32mp15xx-dhcom-u-boot.dtsi
+++ b/arch/arm/dts/stm32mp15xx-dhcom-u-boot.dtsi
@@ -27,8 +27,6 @@
 	config {
 		u-boot,boot-led = "heartbeat";
 		u-boot,error-led = "error";
-		st,fastboot-gpios = <&gpioa 13 GPIO_ACTIVE_LOW>;
-		st,stm32prog-gpios = <&gpioa 14 GPIO_ACTIVE_LOW>;
 		dh,som-coding-gpios = <&gpiof 12 0>, <&gpiof 13 0>, <&gpiof 15 0>;
 		dh,ddr3-coding-gpios = <&gpioz 6 0>, <&gpioz 7 0>;
 	};