configs: am62x_a53: introduce fragment for USB MSC boot

Introduce the config fragment for enabling USB MSC boot. USB MSC boot
involves fetching the next stage of the bootloader from a USB Mass Storage
device such as a USB Flash Drive with the USB controller on the SoC acting
as the USB Host.

Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
diff --git a/configs/am62x_a53_usbmsc.config b/configs/am62x_a53_usbmsc.config
new file mode 100644
index 0000000..873a559
--- /dev/null
+++ b/configs/am62x_a53_usbmsc.config
@@ -0,0 +1,20 @@
+CONFIG_USB=y
+CONFIG_USB_HOST=y
+CONFIG_SPL_USB_HOST=y
+CONFIG_SYSCON=y
+CONFIG_SPL_SYSCON=y
+CONFIG_MISC=y
+CONFIG_SPL_MISC=y
+CONFIG_USB_XHCI_HCD=y
+CONFIG_USB_GADGET=y
+CONFIG_SPL_USB_GADGET=y
+CONFIG_USB_DWC3=y
+CONFIG_USB_DWC3_GENERIC=y
+CONFIG_SPL_USB_DWC3_GENERIC=y
+CONFIG_USB_DWC3_AM62=y
+CONFIG_SPL_USB_DWC3_AM62=y
+CONFIG_USB_STORAGE=y
+CONFIG_SPL_USB_STORAGE=y
+# CONFIG_DM_USB_GADGET is not set
+# CONFIG_SPL_DM_USB_GADGET is not set
+# CONFIG_USB_GADGET_DOWNLOAD is not set