phosphor-fan-presence: srcrev bump 0891e3b3c1..ad2cd247a7

Matthew Barth (1):
      presence: Tach input to double

Change-Id: Ifced0decee9f274c36949cbb247675e19a4b24ae
Signed-off-by: Andrew Geissler <openbmcbump-github@yahoo.com>
diff --git a/recipes-phosphor/fans/phosphor-fan.inc b/recipes-phosphor/fans/phosphor-fan.inc
index 09a3694..f9cce30 100644
--- a/recipes-phosphor/fans/phosphor-fan.inc
+++ b/recipes-phosphor/fans/phosphor-fan.inc
@@ -2,4 +2,4 @@
 LICENSE = "Apache-2.0"
 LIC_FILES_CHKSUM = "file://${S}/LICENSE;md5=e3fc50a88d0a364313df4b21ef20c29e"
 SRC_URI += "git://github.com/openbmc/phosphor-fan-presence"
-SRCREV = "0891e3b3c18fc7a612f67ce51742f6b1cf154cc2"
+SRCREV = "ad2cd247a781e9def144fc1bf12aa784047fd482"