board: st: move type-c stusb1600 controller code in a driver

Migrate the ST Microelectronics STUSB160X Type-C controller code in
a generic I2C driver in st/common, based on Linux one in :
drivers/usb/typec/stusb160x.c

This patch simplifies the stm32mp1 board code and allows to reuse
this STUSB160X driver in other boards.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>
diff --git a/configs/stm32mp15_trusted_defconfig b/configs/stm32mp15_trusted_defconfig
index 8db52cb..f4aa843 100644
--- a/configs/stm32mp15_trusted_defconfig
+++ b/configs/stm32mp15_trusted_defconfig
@@ -6,6 +6,7 @@
 CONFIG_ENV_SECT_SIZE=0x40000
 CONFIG_TARGET_ST_STM32MP15x=y
 CONFIG_CMD_STM32PROG=y
+CONFIG_TYPEC_STUSB160X=y
 CONFIG_ENV_OFFSET_REDUND=0x2C0000
 CONFIG_DISTRO_DEFAULTS=y
 CONFIG_FIT=y