genericarm64.conf: increase INITRAMFS_MAXSIZE

Since pmem kernel drivers were enabled as modules, the initrd
size limit is hit. On genericarm64 all kernel modules and some
firmware files get installed to initrd by default which make
the thing large. I'm working on patches to reduce the kernel drivers
installed to initrd and to make the kernel in general more modular
(btrfs 5 Mb etc built into kernel by default). For now just increase
the size limit to unblock genericarm64 builds and testing.

Fixes: https://bugzilla.yoctoproject.org/show_bug.cgi?id=15833

(From meta-yocto rev: 09bef6a491c087f0f0371874e759aae08a720c4e)

Signed-off-by: Mikko Rapeli <mikko.rapeli@linaro.org>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta-yocto-bsp/conf/machine/genericarm64.conf

@@ -17,6 +17,8 @@ PREFERRED_PROVIDER_virtual/kernel ?= "linux-yocto"
 MACHINE_EXTRA_RRECOMMENDS += "kernel-modules"
 # Install selected pieces of firmware
 MACHINE_EXTRA_RRECOMMENDS += "linux-firmware-wl12xx linux-firmware-wl18xx linux-firmware-rtl-nic"
+# increase default size since we install a lot of kernel drivers and firmware by default
+INITRAMFS_MAXSIZE = "200000"
 
 # Use an initramfs and populate it with the kernel modules and key firmware
 INITRAMFS_IMAGE ?= "core-image-initramfs-boot"