configs: add qcm6490_defconfig

Introduce a defconfig for the RB3 Gen 2 and other QCM6490 boards with a
dedicated uefi partition. These can replace EDK2 entirely with U-Boot.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
diff --git a/configs/qcm6490_defconfig b/configs/qcm6490_defconfig
new file mode 100644
index 0000000..5ddc5ab
--- /dev/null
+++ b/configs/qcm6490_defconfig
@@ -0,0 +1,21 @@
+# Configuration for building U-Boot to be flashed
+# to the uefi partition of QCM6490 dev boards with
+# the "Linux Embedded" partition layout (which have
+# a dedicated "uefi" partition for edk2/U-Boot)
+
+#include "qcom_defconfig"
+
+# Otherwise buildman thinks this isn't an ARM platform
+CONFIG_ARM=y
+
+CONFIG_DEBUG_UART=y
+CONFIG_DEBUG_UART_ANNOUNCE=y
+CONFIG_DEBUG_UART_BASE=0x994000
+CONFIG_DEBUG_UART_MSM_GENI=y
+CONFIG_DEBUG_UART_CLOCK=14745600
+
+# Address where U-Boot will be loaded
+CONFIG_TEXT_BASE=0x9fc00000
+CONFIG_REMAKE_ELF=y
+
+CONFIG_DEFAULT_DEVICE_TREE="qcom/qcs6490-rb3gen2"