phosphor-fan.inc: bump version

Change-Id: I4a2c4a4c14dde3c7b439433fa950329b5610be76
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/common/recipes-phosphor/fans/phosphor-fan.inc b/common/recipes-phosphor/fans/phosphor-fan.inc
index 1131bfd..a6a3f68 100644
--- a/common/recipes-phosphor/fans/phosphor-fan.inc
+++ b/common/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 = "be605c5f8da935afb7dd13300cab24e986d3a474"
+SRCREV = "8e9a8e75ab05e6ab69634ea365231dc6cee56087"