chore(rpi4): limit imager install to wic

We currently only support imaging with wic. By that, limit the
IMAGE_INSTALL to that mode as well. This speeds avoids building these
dependencies when just creating a rootfs.

Signed-off-by: Felix Moessbauer <[email protected]>

Author: fmoessbauer

meta-isar/conf/machine/rpi4b.conf

@@ -13,7 +13,7 @@ IMAGE_FSTYPES ?= "wic"
 WKS_FILE ?= "rpi4b.wks"
 
 IMAGER_BUILD_DEPS = "rpi-firmware linux-image-${KERNEL_NAME}"
-IMAGER_INSTALL += "${IMAGER_BUILD_DEPS}"
+IMAGER_INSTALL:wic += "${IMAGER_BUILD_DEPS}"
 
 IMAGE_BOOT_FILES = " \
     /usr/lib/rpi-firmware/bootcode.bin;bootcode.bin \