emulation/qemu-q35: Increase default ROM_SIZE

Larger size fits GRUB payload and fixes case to
build 82801ix with HAVE_INTEL_FIRMWARE.

Change-Id: I90e33fb3a0b0e1a60dcc2a9a022bef034f3270d8
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/17830
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Martin Roth <martinroth@google.com>
1 file changed