ARM: exynos_defconfig: Enable SBS battery support

Many Exynos5 boards (e.g: Snow, Peach Pit and Pi) have
a SBS-compliant gas gauge battery. Enable to built it
so the needed support is available for these boards.
Suggested-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Reviewed-by: Doug Anderson <dianders@chromium.org>
Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/configs/exynos_defconfig

@@ -80,6 +80,7 @@ CONFIG_SPI_S3C64XX=y
 CONFIG_I2C_S3C2410=y
 CONFIG_DEBUG_GPIO=y
 CONFIG_POWER_SUPPLY=y
+CONFIG_BATTERY_SBS=y
 CONFIG_CHARGER_TPS65090=y
 # CONFIG_HWMON is not set
 CONFIG_THERMAL=y