meta-facebook: bletchley: set kernel VMSPLIT_3G_OPT

We are increasing the RAM for PVT to 2G.  In order for userspace
to be able to access larger amounts of RAM (and mmap'd files),
move the VMSPLIT up to 3G.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I96f095f3ea3f6e9e585764d14bbe17ef67df9a8a
diff --git a/meta-facebook/meta-bletchley/recipes-kernel/linux/linux-aspeed/bletchley.cfg b/meta-facebook/meta-bletchley/recipes-kernel/linux/linux-aspeed/bletchley.cfg
index 49d7404..9b7609c 100644
--- a/meta-facebook/meta-bletchley/recipes-kernel/linux/linux-aspeed/bletchley.cfg
+++ b/meta-facebook/meta-bletchley/recipes-kernel/linux/linux-aspeed/bletchley.cfg
@@ -1,3 +1,5 @@
+# large memory support
+CONFIG_VMSPLIT_3G_OPT=y
 # aspeed-pwm driver
 CONFIG_HAVE_CLK=y
 CONFIG_PWM=y