Add support for external i2c devices (#3642)

This commit adds support for usb to i2c adapters, the i2c chardev and the bme280  famaily environment sensors

buildroot-external/board/pc/ova/kernel.config

@@ -124,7 +124,19 @@ CONFIG_DWMAC_INTEL=m
 CONFIG_I6300ESB_WDT=y
 
 CONFIG_I2C=y
+CONFIG_I2C_BOARDINFO=y
+CONFIG_I2C_COMPAT=y
+CONFIG_I2C_CHARDEV=m
 CONFIG_I2C_MUX=y
+CONFIG_I2C_TINY_USB=m
+
+CONFIG_I2C_DLN2=m
+CONFIG_GPIO_DLN2=m
+CONFIG_MFD_DLN2=m
+CONFIG_DLN2_ADC=m
+
+CONFIG_IIO=m
+CONFIG_BMP280=m
 
 # Required for some PCIe devices such as ath12k
 CONFIG_IRQ_REMAP=y