x86: chromebook_link: Expand early malloc() memory

Now that PCI bridges are probed before relocation we need additional memory.
Each PCI bridge takes 240 bytes at present since it uses the same uclass as
the PCI controller. Probably we should split this out so that bridges have
their own uclass.

Expand the memory on link so that it works correctly.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

configs/chromebook_link_defconfig

@@ -1,4 +1,5 @@
 CONFIG_X86=y
+CONFIG_SYS_MALLOC_F_LEN=0x1800
 CONFIG_VENDOR_GOOGLE=y
 CONFIG_DEFAULT_DEVICE_TREE="chromebook_link"
 CONFIG_TARGET_CHROMEBOOK_LINK=y