eib_image: Drop customized CMA parameter from RPi's boot arguments

RPi firmware coworks with device tree to decide the CMA size
automatically. Then, kernel allocates the CMA memory. So, there is no
need to insert the customized cma argument into the boot command.

https://app.asana.com/1/1203676861188277/project/1211061530470838/task/1211645002178218

Author: starnight

stages/eib_image

@@ -70,14 +70,6 @@ else
   ostree --repo="${REPOPATH}" config set sysroot.bootloader none
 fi
 
-# Platform dependent boot arguments
-platform_bootargs="platform_bootargs="
-if [ "${EIB_PLATFORM:0:3}" == "rpi" ]; then
-  # Raspberry Pi needs the memory config if vc4 is loaded
-  # https://phabricator.endlessm.com/T27774#757530
-  platform_bootargs+="cma=256M@512M"
-fi
-
 # 62MB seems to be arbitrarily chosen to minimize the impact of the ESP
 # on non-EFI and low storage (small EMMC) devices.
 esp_size=62
@@ -338,12 +330,9 @@ EOF
   # Install bootloader
   case "${EIB_ARCH}" in
     arm64)
-      cp "${EIB_DATADIR}"/arm64/boot.src "${EIB_TMPDIR}"/boot.src
-      sed -i "1s/^/"$platform_bootargs"\n/" "${EIB_TMPDIR}"/boot.src
-
       # Make a boot script for u-boot
       mkimage -T script -C none -n "Endless OS arm64 boot script" -d \
-        "${EIB_TMPDIR}"/boot.src \
+        "${EIB_DATADIR}"/arm64/boot.src \
         "${ROOT}"/boot/boot.scr
 
       case "${EIB_PLATFORM}" in