phosphor-fan.inc: bump version

Change-Id: I714b0263dcfdf7e2ef23ce2f91875caa8182125f
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 90c96f4..f2e6b59 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 = "5cfdf94fdf0ac1167c9337cec95ba4d932ad40f7"
+SRCREV = "78498c941d3f0445e2c62894123e05df057258f7"