meta-facebook: yosemite4: add ISL28022 support

1. Add ISL28022 to kernel config.
2. Bind correct ADC driver according to Medusa board FRU

Tested:
Verified with yosemite4 DVT medusa board.

Change-Id: Id67b077310beaad541507912dafb22671d0298f4
Signed-off-by: Yikai Tsai <yikai.tsai.wiwynn@gmail.com>
diff --git a/meta-facebook/meta-yosemite4/recipes-yosemite4/plat-tool/files/yosemite4-common-functions b/meta-facebook/meta-yosemite4/recipes-yosemite4/plat-tool/files/yosemite4-common-functions
index d8a54c4..68dcd0d 100644
--- a/meta-facebook/meta-yosemite4/recipes-yosemite4/plat-tool/files/yosemite4-common-functions
+++ b/meta-facebook/meta-yosemite4/recipes-yosemite4/plat-tool/files/yosemite4-common-functions
@@ -34,3 +34,11 @@
     PRODUCT_VERSION=$(busctl get-property xyz.openbmc_project.EntityManager /xyz/openbmc_project/inventory/system/board/Yosemite_4_"$FRU_NAME" xyz.openbmc_project.Inventory.Decorator.Revision Version| awk -F\" '{print $2}')
     echo "$PRODUCT_VERSION"
 }
+
+get_product_model()
+{
+    local FRU_NAME=$1
+    local PRODUCT_MODEL
+    PRODUCT_MODEL=$(busctl get-property xyz.openbmc_project.EntityManager /xyz/openbmc_project/inventory/system/board/Yosemite_4_"$FRU_NAME" xyz.openbmc_project.Inventory.Decorator.Asset Model| awk -F\" '{print $2}')
+    echo "$PRODUCT_MODEL"
+}