Provide mdef files for bmp280 driver

linux_kernel_modules/bmp280/bmp280-i2c.mdef

+sources:
+{
+    bmp280-i2c.c
+}
+

linux_kernel_modules/bmp280/bmp280-spi.mdef

+sources:
+{
+    bmp280-spi.c
+}
+

linux_kernel_modules/bmp280/bmp280.mdef

+cflags:
+{
+    // This driver depends on IIO
+    -DCONFIG_IIO
+}
+
+sources:
+{
+    bmp280-core.c
+    bmp280-regmap.c
+}
+