conf: machine: k3: Add fitImage to the default kernel image types

FIT Image based kernels are valid for all K3 devices, not just HS, deploy
this kernel image type by default so it doesn't have to be appended on
a per-device-type basis.

Signed-off-by: Andrew Davis <afd@ti.com>
Signed-off-by: Ryan Eatmon <reatmon@ti.com>

conf/machine/include/k3.inc

@@ -15,7 +15,7 @@ PREFERRED_PROVIDER_virtual/bootloader = "u-boot-ti-staging"
 PREFERRED_PROVIDER_u-boot = "u-boot-ti-staging"
 
 KERNEL_IMAGETYPE = "Image"
-KERNEL_IMAGETYPES = "Image vmlinux.gz"
+KERNEL_IMAGETYPES = "Image vmlinux.gz fitImage"
 
 UBOOT_ARCH = "arm"
 UBOOT_ENTRYPOINT = "0x80008000"