configs/atmel_sama5d4_xplained_mmc_dev: increase ext4 image size

The default of 60 MB is no longer sufficient to contain all the tools
enabled in this "development" defconfig, so let's increase the ext4
image size to 120 MB.

Fixes:

  https://gitlab.com/buildroot.org/buildroot/-/jobs/199339426

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
1 file changed