ARM: configs: at91: sama5: enable MCP16502 regulator

Driver is built as a module.
Signed-off-by: Razvan Stefanescu <razvan.stefanescu@microchip.com>
Link: https://lore.kernel.org/r/20200325102223.24827-2-eugen.hristev@microchip.comSigned-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

arch/arm/configs/sama5_defconfig

@@ -143,6 +143,7 @@ CONFIG_REGULATOR=y
 CONFIG_REGULATOR_FIXED_VOLTAGE=y
 CONFIG_REGULATOR_ACT8865=y
 CONFIG_REGULATOR_ACT8945A=y
+CONFIG_REGULATOR_MCP16502=m
 CONFIG_REGULATOR_PWM=m
 CONFIG_MEDIA_SUPPORT=y
 CONFIG_MEDIA_CAMERA_SUPPORT=y