ARM: bcm2835_defconfig: Enable fixed-regulator

This regulator is now used to control the SD card's power supply on the
Raspberry Pi 4.

Suggested-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Link: https://lore.kernel.org/r/20200326134458.13992-1-nsaenzjulienne@suse.de
diff --git a/arch/arm/configs/bcm2835_defconfig b/arch/arm/configs/bcm2835_defconfig
index 3843754..0d5aa4a 100644
--- a/arch/arm/configs/bcm2835_defconfig
+++ b/arch/arm/configs/bcm2835_defconfig
@@ -103,6 +103,7 @@
 CONFIG_BCM2835_WDT=y
 CONFIG_MFD_SYSCON=y
 CONFIG_REGULATOR=y
+CONFIG_REGULATOR_FIXED_VOLTAGE=y
 CONFIG_REGULATOR_GPIO=y
 CONFIG_MEDIA_SUPPORT=y
 CONFIG_MEDIA_CAMERA_SUPPORT=y