meta-bletchley: kernel: enable si7020 configuration

Enable si7020 driver to support 2nd source front panel board.

Signed-off-by: Potin Lai <potin.lai@quantatw.com>
Change-Id: I3c91d1af9d8316670f946849d31d6c9608200fdf
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 d90526e..8cf7e0f 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
@@ -35,4 +35,6 @@
 CONFIG_USB_EHCI_HCD_PLATFORM=y
 # REGULATOR
 CONFIG_REGULATOR=y
-CONFIG_REGULATOR_FIXED_VOLTAGE=y
\ No newline at end of file
+CONFIG_REGULATOR_FIXED_VOLTAGE=y
+# si7020
+CONFIG_SI7020=y
\ No newline at end of file