stm32mp1: remove CONFIG_USB_DWC2, HOST support for USBO

Remove the HOST support for STM32MP1 USBO device = OTG DWC2.
The current DWC2 driver have no dynamic detection of device,
So it is dangerous to have start 3V3 when PC is
connected to the micro USB connector.

=> it is preferable to have only DEVICE support
   CONFIG_USB_GADGET_DWC2_OTG for OTG port

See DWC3 driver for clean dual role support...

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
diff --git a/configs/stm32mp15_basic_defconfig b/configs/stm32mp15_basic_defconfig
index 6781adb..b6c1972 100644
--- a/configs/stm32mp15_basic_defconfig
+++ b/configs/stm32mp15_basic_defconfig
@@ -71,7 +71,6 @@
 CONFIG_DM_USB=y
 CONFIG_USB_EHCI_HCD=y
 CONFIG_USB_EHCI_GENERIC=y
-CONFIG_USB_DWC2=y
 CONFIG_USB_GADGET=y
 CONFIG_USB_GADGET_MANUFACTURER="STMicroelectronics"
 CONFIG_USB_GADGET_VENDOR_NUM=0x0483
diff --git a/configs/stm32mp15_trusted_defconfig b/configs/stm32mp15_trusted_defconfig
index a050cee..ed2a2e6 100644
--- a/configs/stm32mp15_trusted_defconfig
+++ b/configs/stm32mp15_trusted_defconfig
@@ -62,7 +62,6 @@
 CONFIG_DM_USB=y
 CONFIG_USB_EHCI_HCD=y
 CONFIG_USB_EHCI_GENERIC=y
-CONFIG_USB_DWC2=y
 CONFIG_USB_GADGET=y
 CONFIG_USB_GADGET_MANUFACTURER="STMicroelectronics"
 CONFIG_USB_GADGET_VENDOR_NUM=0x0483