meta-facebook: minerva: enable spi-gpio on kconfig

Enable spi-gpio configuration for the TPM2

Change-Id: I0a7aa48b53454cbe558cdfa1697a89cdfd98e248
Signed-off-by: Yang Chen <yang.chen@quantatw.com>
diff --git a/meta-facebook/meta-minerva/recipes-kernel/linux/linux-aspeed/minerva.cfg b/meta-facebook/meta-minerva/recipes-kernel/linux/linux-aspeed/minerva.cfg
index ec839d9..7971f3e 100644
--- a/meta-facebook/meta-minerva/recipes-kernel/linux/linux-aspeed/minerva.cfg
+++ b/meta-facebook/meta-minerva/recipes-kernel/linux/linux-aspeed/minerva.cfg
@@ -22,3 +22,6 @@
 CONFIG_SENSORS_INA2XX=y
 CONFIG_SENSORS_LTC2945=y
 CONFIG_SENSORS_MAX31790=y
+
+# SPI GPIO
+CONFIG_SPI_GPIO=y