ARM: omap2plus_defconfig: switch to the IIO BMP085 driver

This alters the OMAP2plus defconfig to use the IIO BMP280
driver, which is compatible with the BMP085 instead of the old
BMP085-specific misc driver. The IIO driver nowadays have all
the features of the old driver and more.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>